91900983 has 8 divisors (see below), whose sum is σ = 122581888. Its totient is φ = 61243704.

The previous prime is 91900981. The next prime is 91900999. The reversal of 91900983 is 38900919.

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

It is not a de Polignac number, because 91900983 - 2¹ = 91900981 is a prime.

It is the 9587-th Hogben number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91900981) by changing a digit.

It is a nontrivial repunit in base 9586.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7560 + ... + 15522.

It is an arithmetic number, because the mean of its divisors is an integer number (15322736).

Almost surely, 2^91900983 is an apocalyptic number.

91900983 is a deficient number, since it is larger than the sum of its proper divisors (30680905).

91900983 is a wasteful number, since it uses less digits than its factorization.

91900983 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11813.

The product of its (nonzero) digits is 17496, while the sum is 39.

The square root of 91900983 is about 9586.5000391175. The cubic root of 91900983 is about 451.2737295655.

The spelling of 91900983 in words is "ninety-one million, nine hundred thousand, nine hundred eighty-three".