91968357 has 32 divisors (see below), whose sum is σ = 136338048. Its totient is φ = 54786816.

The previous prime is 91968343. The next prime is 91968389. The reversal of 91968357 is 75386919.

It is not a de Polignac number, because 91968357 - 2⁷ = 91968229 is a prime.

It is a super-3 number, since 3×91968357³ (a number of 25 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91968307) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 289963 + ... + 290279.

It is an arithmetic number, because the mean of its divisors is an integer number (4260564).

Almost surely, 2^91968357 is an apocalyptic number.

It is an amenable number.

91968357 is a deficient number, since it is larger than the sum of its proper divisors (44369691).

91968357 is a wasteful number, since it uses less digits than its factorization.

91968357 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 549.

The product of its digits is 408240, while the sum is 48.

The square root of 91968357 is about 9590.0133993650. The cubic root of 91968357 is about 451.3839811587.

The spelling of 91968357 in words is "ninety-one million, nine hundred sixty-eight thousand, three hundred fifty-seven".