91901292 has 48 divisors (see below), whose sum is σ = 247618560. Its totient is φ = 25984512.

The previous prime is 91901281. The next prime is 91901297. The reversal of 91901292 is 29210919.

It is not an unprimeable number, because it can be changed into a prime (91901297) 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, 2509 + ... + 13787.

It is an arithmetic number, because the mean of its divisors is an integer number (5158720).

Almost surely, 2^91901292 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 91901292, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (123809280).

91901292 is an abundant number, since it is smaller than the sum of its proper divisors (155717268).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

91901292 is a wasteful number, since it uses less digits than its factorization.

91901292 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11390 (or 11388 counting only the distinct ones).

The product of its (nonzero) digits is 2916, while the sum is 33.

The square root of 91901292 is about 9586.5161555176. The cubic root of 91901292 is about 451.2742353397.

The spelling of 91901292 in words is "ninety-one million, nine hundred one thousand, two hundred ninety-two".