1088723381 has 4 divisors (see below), whose sum is σ = 1089041772. Its totient is φ = 1088404992.

The previous prime is 1088723353. The next prime is 1088723399. The reversal of 1088723381 is 1833278801.

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 81613156 + 1007110225 = 9034^2 + 31735^2 .

It is a cyclic number.

It is not a de Polignac number, because 1088723381 - 2¹⁰ = 1088722357 is a prime.

It is a super-2 number, since 2×1088723381² = 2370637200672142322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1088723341) 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, 154010 + ... + 160923.

It is an arithmetic number, because the mean of its divisors is an integer number (272260443).

Almost surely, 2^1088723381 is an apocalyptic number.

It is an amenable number.

1088723381 is a deficient number, since it is larger than the sum of its proper divisors (318391).

1088723381 is an equidigital number, since it uses as much as digits as its factorization.

1088723381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 318390.

The product of its (nonzero) digits is 64512, while the sum is 41.

The square root of 1088723381 is about 32995.8085368430. The cubic root of 1088723381 is about 1028.7405289319.

The spelling of 1088723381 in words is "one billion, eighty-eight million, seven hundred twenty-three thousand, three hundred eighty-one".