91792681 has 4 divisors (see below), whose sum is σ = 92453200. Its totient is φ = 91132164.

The previous prime is 91792669. The next prime is 91792691. The reversal of 91792681 is 18629719.

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 an emirpimes, since its reverse is a distinct semiprime: 18629719 = 47 ⋅396377.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-91792681 is a prime.

It is a super-2 number, since 2×91792681² = 16851792570335522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (91792601) 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, 330051 + ... + 330328.

It is an arithmetic number, because the mean of its divisors is an integer number (23113300).

Almost surely, 2^91792681 is an apocalyptic number.

It is an amenable number.

91792681 is a deficient number, since it is larger than the sum of its proper divisors (660519).

91792681 is a wasteful number, since it uses less digits than its factorization.

91792681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 660518.

The product of its digits is 54432, while the sum is 43.

The square root of 91792681 is about 9580.8497013574. The cubic root of 91792681 is about 451.0963899364.

The spelling of 91792681 in words is "ninety-one million, seven hundred ninety-two thousand, six hundred eighty-one".