91274799 has 48 divisors (see below), whose sum is σ = 157856256. Its totient is φ = 46368000.

The previous prime is 91274791. The next prime is 91274809. The reversal of 91274799 is 99747219.

It is a happy number.

It is not a de Polignac number, because 91274799 - 2³ = 91274791 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91274791) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 75399 + ... + 76599.

It is an arithmetic number, because the mean of its divisors is an integer number (3288672).

Almost surely, 2^91274799 is an apocalyptic number.

91274799 is a deficient number, since it is larger than the sum of its proper divisors (66581457).

91274799 is a wasteful number, since it uses less digits than its factorization.

91274799 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1276 (or 1269 counting only the distinct ones).

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

The square root of 91274799 is about 9553.7845380770. The cubic root of 91274799 is about 450.2464477215.

The spelling of 91274799 in words is "ninety-one million, two hundred seventy-four thousand, seven hundred ninety-nine".