91000082 has 16 divisors (see below), whose sum is σ = 152137440. Its totient is φ = 40569408.

The previous prime is 91000081. The next prime is 91000163. The reversal of 91000082 is 28000019.

It is not an unprimeable number, because it can be changed into a prime (91000081) 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, 69788 + ... + 71079.

It is an arithmetic number, because the mean of its divisors is an integer number (9508590).

Almost surely, 2^91000082 is an apocalyptic number.

91000082 is a deficient number, since it is larger than the sum of its proper divisors (61137358).

91000082 is a wasteful number, since it uses less digits than its factorization.

91000082 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140905.

The product of its (nonzero) digits is 144, while the sum is 20.

The square root of 91000082 is about 9539.3963121363. The cubic root of 91000082 is about 449.7942796305.

The spelling of 91000082 in words is "ninety-one million, eighty-two", and thus it is an aban number and an uban number.