1101623381 has 4 divisors (see below), whose sum is σ = 1101700032. Its totient is φ = 1101546732.

The previous prime is 1101623371. The next prime is 1101623423. The reversal of 1101623381 is 1833261011.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 1101623381 - 2⁶ = 1101623317 is a prime.

It is a super-2 number, since 2×1101623381² = 2427148147131742322, which contains 22 as substring.

It is a deceptive number, since it divides R_1101623380.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1101623381.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1101623351) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9581 + ... + 47906.

It is an arithmetic number, because the mean of its divisors is an integer number (275425008).

It is a Poulet number, since it divides 2^1101623380-1.

Almost surely, 2^1101623381 is an apocalyptic number.

1101623381 is the 19163-rd octagonal number.

It is an amenable number.

1101623381 is a deficient number, since it is larger than the sum of its proper divisors (76651).

1101623381 is an equidigital number, since it uses as much as digits as its factorization.

1101623381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76650.

The product of its (nonzero) digits is 864, while the sum is 26.

The square root of 1101623381 is about 33190.7122701517. The cubic root of 1101623381 is about 1032.7876791615.

Adding to 1101623381 its reverse (1833261011), we get a palindrome (2934884392).

The spelling of 1101623381 in words is "one billion, one hundred one million, six hundred twenty-three thousand, three hundred eighty-one".