91243315 has 4 divisors (see below), whose sum is σ = 109491984. Its totient is φ = 72994648.

The previous prime is 91243283. The next prime is 91243343. The reversal of 91243315 is 51334219.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 91243315 - 2⁵ = 91243283 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9124327 + ... + 9124336.

It is an arithmetic number, because the mean of its divisors is an integer number (27372996).

Almost surely, 2^91243315 is an apocalyptic number.

91243315 is a deficient number, since it is larger than the sum of its proper divisors (18248669).

91243315 is a wasteful number, since it uses less digits than its factorization.

91243315 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18248668.

The product of its digits is 3240, while the sum is 28.

The square root of 91243315 is about 9552.1366719703. The cubic root of 91243315 is about 450.1946729727.

The spelling of 91243315 in words is "ninety-one million, two hundred forty-three thousand, three hundred fifteen".