91292279 has 12 divisors (see below), whose sum is σ = 99601776. Its totient is φ = 83633472.

The previous prime is 91292269. The next prime is 91292309. The reversal of 91292279 is 97229219.

It is a de Polignac number, because none of the positive numbers 2^k-91292279 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 (91292269) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 21182 + ... + 25124.

It is an arithmetic number, because the mean of its divisors is an integer number (8300148).

Almost surely, 2^91292279 is an apocalyptic number.

91292279 is a deficient number, since it is larger than the sum of its proper divisors (8309497).

91292279 is a wasteful number, since it uses less digits than its factorization.

91292279 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4106 (or 4093 counting only the distinct ones).

The product of its digits is 40824, while the sum is 41.

The square root of 91292279 is about 9554.6993149968. The cubic root of 91292279 is about 450.2751880588.

The spelling of 91292279 in words is "ninety-one million, two hundred ninety-two thousand, two hundred seventy-nine".