91964679 has 16 divisors (see below), whose sum is σ = 131297760. Its totient is φ = 57052160.

The previous prime is 91964627. The next prime is 91964701. The reversal of 91964679 is 97646919.

It is a cyclic number.

It is not a de Polignac number, because 91964679 - 2⁹ = 91964167 is a prime.

It is a super-3 number, since 3×91964679³ (a number of 25 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91964179) 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, 5592 + ... + 14669.

It is an arithmetic number, because the mean of its divisors is an integer number (8206110).

Almost surely, 2^91964679 is an apocalyptic number.

91964679 is a deficient number, since it is larger than the sum of its proper divisors (39333081).

91964679 is a wasteful number, since it uses less digits than its factorization.

91964679 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20370.

The product of its digits is 734832, while the sum is 51.

The square root of 91964679 is about 9589.8216354633. The cubic root of 91964679 is about 451.3779638267.

The spelling of 91964679 in words is "ninety-one million, nine hundred sixty-four thousand, six hundred seventy-nine".