91374481 has 15 divisors (see below), whose sum is σ = 101799705. Its totient is φ = 82016220.

The previous prime is 91374467. The next prime is 91374487. The reversal of 91374481 is 18447319.

The square root of 91374481 is 9559.

It is a perfect power (a square), and thus also a powerful number.

It is a de Polignac number, because none of the positive numbers 2^k-91374481 is a prime.

It is a super-2 number, since 2×91374481² = 16698591556038722, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 91374481.

It is not an unprimeable number, because it can be changed into a prime (91374487) by changing a digit.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 1156600 + ... + 1156678.

It is an arithmetic number, because the mean of its divisors is an integer number (6786647).

Almost surely, 2^91374481 is an apocalyptic number.

91374481 is the 9559-th square number.

91374481 is the 4780-th centered octagonal number.

It is an amenable number.

91374481 is a deficient number, since it is larger than the sum of its proper divisors (10425224).

91374481 is an frugal number, since it uses more digits than its factorization.

91374481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 202 (or 90 counting only the distinct ones).

The product of its digits is 24192, while the sum is 37.

The cubic root of 91374481 is about 450.4102941074.

The spelling of 91374481 in words is "ninety-one million, three hundred seventy-four thousand, four hundred eighty-one".