91580983 has 16 divisors (see below), whose sum is σ = 100650816. Its totient is φ = 82817280.

The previous prime is 91580939. The next prime is 91580999. The reversal of 91580983 is 38908519.

It is not a de Polignac number, because 91580983 - 2²¹ = 89483831 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91580903) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 288741 + ... + 289057.

It is an arithmetic number, because the mean of its divisors is an integer number (6290676).

Almost surely, 2^91580983 is an apocalyptic number.

91580983 is a deficient number, since it is larger than the sum of its proper divisors (9069833).

91580983 is a wasteful number, since it uses less digits than its factorization.

91580983 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 714.

The product of its (nonzero) digits is 77760, while the sum is 43.

The square root of 91580983 is about 9569.7953478640. The cubic root of 91580983 is about 450.7493408042.

The spelling of 91580983 in words is "ninety-one million, five hundred eighty thousand, nine hundred eighty-three".