91374279 has 16 divisors (see below), whose sum is σ = 126179424. Its totient is φ = 58780800.

The previous prime is 91374271. The next prime is 91374293. The reversal of 91374279 is 97247319.

It is not a de Polignac number, because 91374279 - 2³ = 91374271 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 91374279.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91374271) 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 15 ways as a sum of consecutive naturals, for example, 4989 + ... + 14409.

It is an arithmetic number, because the mean of its divisors is an integer number (7886214).

Almost surely, 2^91374279 is an apocalyptic number.

91374279 is a deficient number, since it is larger than the sum of its proper divisors (34805145).

91374279 is a wasteful number, since it uses less digits than its factorization.

91374279 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9538.

The product of its digits is 95256, while the sum is 42.

The square root of 91374279 is about 9558.9894340354. The cubic root of 91374279 is about 450.4099622024.

The spelling of 91374279 in words is "ninety-one million, three hundred seventy-four thousand, two hundred seventy-nine".