91516901 has 8 divisors (see below), whose sum is σ = 110095680. Its totient is φ = 74314368.

The previous prime is 91516891. The next prime is 91516903. The reversal of 91516901 is 10961519.

91516901 = 1239² + 1240² + ... + 1295².

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-91516901 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91516903) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 343916 + ... + 344181.

It is an arithmetic number, because the mean of its divisors is an integer number (13761960).

Almost surely, 2^91516901 is an apocalyptic number.

It is an amenable number.

91516901 is a deficient number, since it is larger than the sum of its proper divisors (18578779).

91516901 is a wasteful number, since it uses less digits than its factorization.

91516901 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 688123.

The product of its (nonzero) digits is 2430, while the sum is 32.

The square root of 91516901 is about 9566.4466234857. The cubic root of 91516901 is about 450.6441819304.

The spelling of 91516901 in words is "ninety-one million, five hundred sixteen thousand, nine hundred one".