91902879 has 12 divisors (see below), whose sum is σ = 137031232. Its totient is φ = 59292000.

The previous prime is 91902869. The next prime is 91902887. The reversal of 91902879 is 97820919.

It is not a de Polignac number, because 91902879 - 2⁵ = 91902847 is a prime.

It is a super-2 number, since 2×91902879² = 16892278336977282, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91902809) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 164422 + ... + 164979.

Almost surely, 2^91902879 is an apocalyptic number.

91902879 is a deficient number, since it is larger than the sum of its proper divisors (45128353).

91902879 is a wasteful number, since it uses less digits than its factorization.

91902879 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 329438 (or 329435 counting only the distinct ones).

The product of its (nonzero) digits is 81648, while the sum is 45.

The square root of 91902879 is about 9586.5989276698. The cubic root of 91902879 is about 451.2768329386.

The spelling of 91902879 in words is "ninety-one million, nine hundred two thousand, eight hundred seventy-nine".