91517013 has 32 divisors (see below), whose sum is σ = 155443200. Its totient is φ = 52129008.

The previous prime is 91516987. The next prime is 91517033. The reversal of 91517013 is 31071519.

It is a happy number.

It is not a de Polignac number, because 91517013 - 2⁵ = 91516981 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91517033) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 82420 + ... + 83522.

It is an arithmetic number, because the mean of its divisors is an integer number (4857600).

Almost surely, 2^91517013 is an apocalyptic number.

It is an amenable number.

91517013 is a deficient number, since it is larger than the sum of its proper divisors (63926187).

91517013 is a wasteful number, since it uses less digits than its factorization.

91517013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1558 (or 1552 counting only the distinct ones).

The product of its (nonzero) digits is 945, while the sum is 27.

The square root of 91517013 is about 9566.4524772770. The cubic root of 91517013 is about 450.6443657657.

The spelling of 91517013 in words is "ninety-one million, five hundred seventeen thousand, thirteen".