91590243 has 8 divisors (see below), whose sum is σ = 124190400. Its totient is φ = 60025128.

The previous prime is 91590211. The next prime is 91590259. The reversal of 91590243 is 34209519.

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

It is not a de Polignac number, because 91590243 - 2⁵ = 91590211 is a prime.

It is a super-2 number, since 2×91590243² = 16777545225598098, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (91590283) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 258553 + ... + 258906.

It is an arithmetic number, because the mean of its divisors is an integer number (15523800).

Almost surely, 2^91590243 is an apocalyptic number.

91590243 is a deficient number, since it is larger than the sum of its proper divisors (32600157).

91590243 is a wasteful number, since it uses less digits than its factorization.

91590243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 517521.

The product of its (nonzero) digits is 9720, while the sum is 33.

The square root of 91590243 is about 9570.2791495337. The cubic root of 91590243 is about 450.7645324523.

The spelling of 91590243 in words is "ninety-one million, five hundred ninety thousand, two hundred forty-three".