91996615 has 8 divisors (see below), whose sum is σ = 113379840. Its totient is φ = 71608032.

The previous prime is 91996609. The next prime is 91996621. The reversal of 91996615 is 51669919.

It is an interprime number because it is at equal distance from previous prime (91996609) and next prime (91996621).

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

It is a cyclic number.

It is not a de Polignac number, because 91996615 - 2³ = 91996607 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 248455 + ... + 248824.

It is an arithmetic number, because the mean of its divisors is an integer number (14172480).

Almost surely, 2^91996615 is an apocalyptic number.

91996615 is a deficient number, since it is larger than the sum of its proper divisors (21383225).

91996615 is a wasteful number, since it uses less digits than its factorization.

91996615 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 497321.

The product of its digits is 131220, while the sum is 46.

The square root of 91996615 is about 9591.4865896794. The cubic root of 91996615 is about 451.4302068491.

The spelling of 91996615 in words is "ninety-one million, nine hundred ninety-six thousand, six hundred fifteen".