91968424 has 16 divisors (see below), whose sum is σ = 172638900. Its totient is φ = 45931392.

The previous prime is 91968389. The next prime is 91968449. The reversal of 91968424 is 42486919.

It can be written as a sum of positive squares in 2 ways, for example, as 91968100 + 324 = 9590^2 + 18^2 .

It is a super-3 number, since 3×91968424³ (a number of 25 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1362 + ... + 13630.

Almost surely, 2^91968424 is an apocalyptic number.

It is an amenable number.

91968424 is a deficient number, since it is larger than the sum of its proper divisors (80670476).

91968424 is a wasteful number, since it uses less digits than its factorization.

91968424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13212 (or 13208 counting only the distinct ones).

The product of its digits is 124416, while the sum is 43.

The square root of 91968424 is about 9590.0168925816. The cubic root of 91968424 is about 451.3840907715.

The spelling of 91968424 in words is "ninety-one million, nine hundred sixty-eight thousand, four hundred twenty-four".