91168938 has 24 divisors (see below), whose sum is σ = 225751968. Its totient is φ = 26048232.

The previous prime is 91168927. The next prime is 91168949. The reversal of 91168938 is 83986119.

It is an interprime number because it is at equal distance from previous prime (91168927) and next prime (91168949).

It is a junction number, because it is equal to n+sod(n) for n = 91168893 and 91168902.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 361656 + ... + 361907.

It is an arithmetic number, because the mean of its divisors is an integer number (9406332).

Almost surely, 2^91168938 is an apocalyptic number.

91168938 is an abundant number, since it is smaller than the sum of its proper divisors (134583030).

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

91168938 is a wasteful number, since it uses less digits than its factorization.

91168938 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 723578 (or 723575 counting only the distinct ones).

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

The square root of 91168938 is about 9548.2426655380. The cubic root of 91168938 is about 450.0723143045.

The spelling of 91168938 in words is "ninety-one million, one hundred sixty-eight thousand, nine hundred thirty-eight".