1100111389 has 4 divisors (see below), whose sum is σ = 1184735356. Its totient is φ = 1015487424.

The previous prime is 1100111377. The next prime is 1100111423. The reversal of 1100111389 is 9831110011.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 367488900 + 732622489 = 19170^2 + 27067^2 .

It is a cyclic number.

It is not a de Polignac number, because 1100111389 - 2⁵ = 1100111357 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1100111329) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42311964 + ... + 42311989.

It is an arithmetic number, because the mean of its divisors is an integer number (296183839).

Almost surely, 2^1100111389 is an apocalyptic number.

It is an amenable number.

1100111389 is a deficient number, since it is larger than the sum of its proper divisors (84623967).

1100111389 is an equidigital number, since it uses as much as digits as its factorization.

1100111389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84623966.

The product of its (nonzero) digits is 216, while the sum is 25.

The square root of 1100111389 is about 33167.9271134028. The cubic root of 1100111389 is about 1032.3149581136.

The spelling of 1100111389 in words is "one billion, one hundred million, one hundred eleven thousand, three hundred eighty-nine".