91689318 has 48 divisors (see below), whose sum is σ = 227784960. Its totient is φ = 26111088.

The previous prime is 91689259. The next prime is 91689319. The reversal of 91689318 is 81398619.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91689319) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 44221 + ... + 46247.

It is an arithmetic number, because the mean of its divisors is an integer number (4745520).

Almost surely, 2^91689318 is an apocalyptic number.

91689318 is an abundant number, since it is smaller than the sum of its proper divisors (136095642).

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

91689318 is a wasteful number, since it uses less digits than its factorization.

91689318 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2401 (or 2398 counting only the distinct ones).

The product of its digits is 93312, while the sum is 45.

The square root of 91689318 is about 9575.4539317987. The cubic root of 91689318 is about 450.9270075561.

The spelling of 91689318 in words is "ninety-one million, six hundred eighty-nine thousand, three hundred eighteen".