91312516 has 24 divisors (see below), whose sum is σ = 162279936. Its totient is φ = 44952480.

The previous prime is 91312513. The next prime is 91312517. The reversal of 91312516 is 61521319.

It is not an unprimeable number, because it can be changed into a prime (91312513) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 81190 + ... + 82306.

It is an arithmetic number, because the mean of its divisors is an integer number (6761664).

Almost surely, 2^91312516 is an apocalyptic number.

It is an amenable number.

91312516 is a deficient number, since it is larger than the sum of its proper divisors (70967420).

91312516 is a wasteful number, since it uses less digits than its factorization.

91312516 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1419 (or 1417 counting only the distinct ones).

The product of its digits is 1620, while the sum is 28.

The square root of 91312516 is about 9555.7582639998. The cubic root of 91312516 is about 450.3084568297.

The spelling of 91312516 in words is "ninety-one million, three hundred twelve thousand, five hundred sixteen".