91082915 has 24 divisors (see below), whose sum is σ = 138706992. Its totient is φ = 56777280.

The previous prime is 91082899. The next prime is 91082917. The reversal of 91082915 is 51928019.

It is not a de Polignac number, because 91082915 - 2⁴ = 91082899 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (91082917) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 14204 + ... + 19593.

It is an arithmetic number, because the mean of its divisors is an integer number (5779458).

Almost surely, 2^91082915 is an apocalyptic number.

91082915 is a deficient number, since it is larger than the sum of its proper divisors (47624077).

91082915 is a wasteful number, since it uses less digits than its factorization.

91082915 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33827 (or 33820 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 35.

The square root of 91082915 is about 9543.7369515300. The cubic root of 91082915 is about 449.9307136124.

The spelling of 91082915 in words is "ninety-one million, eighty-two thousand, nine hundred fifteen".