91691682 has 16 divisors (see below), whose sum is σ = 193035360. Its totient is φ = 28955232.

The previous prime is 91691681. The next prime is 91691683. The reversal of 91691682 is 28619619.

It is an interprime number because it is at equal distance from previous prime (91691681) and next prime (91691683).

It is not an unprimeable number, because it can be changed into a prime (91691681) 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, 402043 + ... + 402270.

It is an arithmetic number, because the mean of its divisors is an integer number (12064710).

Almost surely, 2^91691682 is an apocalyptic number.

91691682 is an abundant number, since it is smaller than the sum of its proper divisors (101343678).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

91691682 is a wasteful number, since it uses less digits than its factorization.

91691682 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 804337.

The product of its digits is 46656, while the sum is 42.

The square root of 91691682 is about 9575.5773716262. The cubic root of 91691682 is about 450.9308828977.

The spelling of 91691682 in words is "ninety-one million, six hundred ninety-one thousand, six hundred eighty-two".