91297479 has 16 divisors (see below), whose sum is σ = 149821952. Its totient is φ = 48156768.

The previous prime is 91297477. The next prime is 91297499. The reversal of 91297479 is 97479219.

It is a happy number.

It is not a de Polignac number, because 91297479 - 2¹ = 91297477 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91297477) 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, 166939 + ... + 167484.

It is an arithmetic number, because the mean of its divisors is an integer number (9363872).

Almost surely, 2^91297479 is an apocalyptic number.

91297479 is a deficient number, since it is larger than the sum of its proper divisors (58524473).

91297479 is a wasteful number, since it uses less digits than its factorization.

91297479 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 334446.

The product of its digits is 285768, while the sum is 48.

The square root of 91297479 is about 9554.9714285287. The cubic root of 91297479 is about 450.2837371079.

The spelling of 91297479 in words is "ninety-one million, two hundred ninety-seven thousand, four hundred seventy-nine".