91939292 has 12 divisors (see below), whose sum is σ = 161536536. Its totient is φ = 45786000.

The previous prime is 91939283. The next prime is 91939297. The reversal of 91939292 is 29293919.

It is a super-2 number, since 2×91939292² = 16905666826922528, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91939297) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 44783 + ... + 46790.

It is an arithmetic number, because the mean of its divisors is an integer number (13461378).

Almost surely, 2^91939292 is an apocalyptic number.

It is an amenable number.

91939292 is a deficient number, since it is larger than the sum of its proper divisors (69597244).

91939292 is a wasteful number, since it uses less digits than its factorization.

91939292 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91828 (or 91826 counting only the distinct ones).

The product of its digits is 78732, while the sum is 44.

The square root of 91939292 is about 9588.4979011313. The cubic root of 91939292 is about 451.3364254626.

The spelling of 91939292 in words is "ninety-one million, nine hundred thirty-nine thousand, two hundred ninety-two".