91318685 has 16 divisors (see below), whose sum is σ = 112698432. Its totient is φ = 70992000.

The previous prime is 91318681. The next prime is 91318687. The reversal of 91318685 is 58681319.

It is not a de Polignac number, because 91318685 - 2² = 91318681 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (41).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91318681) 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, 62210 + ... + 63660.

It is an arithmetic number, because the mean of its divisors is an integer number (7043652).

Almost surely, 2^91318685 is an apocalyptic number.

It is an amenable number.

91318685 is a deficient number, since it is larger than the sum of its proper divisors (21379747).

91318685 is a wasteful number, since it uses less digits than its factorization.

91318685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1804.

The product of its digits is 51840, while the sum is 41.

The square root of 91318685 is about 9556.0810482122. The cubic root of 91318685 is about 450.3185974269.

The spelling of 91318685 in words is "ninety-one million, three hundred eighteen thousand, six hundred eighty-five".