91749474 has 12 divisors (see below), whose sum is σ = 198790566. Its totient is φ = 30583152.

The previous prime is 91749473. The next prime is 91749503. The reversal of 91749474 is 47494719.

91749474 is a `hidden beast` number, since 9 + 174 + 9 + 474 = 666.

It can be written as a sum of positive squares in only one way, i.e., 91068849 + 680625 = 9543^2 + 825^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (91749473) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2548579 + ... + 2548614.

Almost surely, 2^91749474 is an apocalyptic number.

91749474 is an abundant number, since it is smaller than the sum of its proper divisors (107041092).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

91749474 is a wasteful number, since it uses less digits than its factorization.

91749474 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5097201 (or 5097198 counting only the distinct ones).

The product of its digits is 254016, while the sum is 45.

The square root of 91749474 is about 9578.5945733182. The cubic root of 91749474 is about 451.0256015018.

The spelling of 91749474 in words is "ninety-one million, seven hundred forty-nine thousand, four hundred seventy-four".