91160681 has 8 divisors (see below), whose sum is σ = 97480584. Its totient is φ = 84947200.

The previous prime is 91160639. The next prime is 91160737. The reversal of 91160681 is 18606119.

It can be written as a sum of positive squares in 4 ways, for example, as 62173225 + 28987456 = 7885^2 + 5384^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 91160681 - 2¹⁴ = 91144297 is a prime.

It is a super-2 number, since 2×91160681² = 16620539520767522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (91160611) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24830 + ... + 28263.

It is an arithmetic number, because the mean of its divisors is an integer number (12185073).

Almost surely, 2^91160681 is an apocalyptic number.

It is an amenable number.

91160681 is a deficient number, since it is larger than the sum of its proper divisors (6319903).

91160681 is a wasteful number, since it uses less digits than its factorization.

91160681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53211.

The product of its (nonzero) digits is 2592, while the sum is 32.

The square root of 91160681 is about 9547.8102725180. The cubic root of 91160681 is about 450.0587264920.

The spelling of 91160681 in words is "ninety-one million, one hundred sixty thousand, six hundred eighty-one".