91691677 has 16 divisors (see below), whose sum is σ = 115702272. Its totient is φ = 70582320.

The previous prime is 91691657. The next prime is 91691681. The reversal of 91691677 is 77619619.

It is a cyclic number.

It is not a de Polignac number, because 91691677 - 2¹⁹ = 91167389 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91691657) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 783 + ... + 13564.

It is an arithmetic number, because the mean of its divisors is an integer number (7231392).

Almost surely, 2^91691677 is an apocalyptic number.

It is an amenable number.

91691677 is a deficient number, since it is larger than the sum of its proper divisors (24010595).

91691677 is a wasteful number, since it uses less digits than its factorization.

91691677 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14448.

The product of its digits is 142884, while the sum is 46.

The square root of 91691677 is about 9575.5771105453. The cubic root of 91691677 is about 450.9308747012.

The spelling of 91691677 in words is "ninety-one million, six hundred ninety-one thousand, six hundred seventy-seven".