91770484 has 12 divisors (see below), whose sum is σ = 172952164. Its totient is φ = 42355584.

The previous prime is 91770473. The next prime is 91770487. The reversal of 91770484 is 48407719.

It can be written as a sum of positive squares in 2 ways, for example, as 14822500 + 76947984 = 3850^2 + 8772^2 .

It is a hoax number, since the sum of its digits (40) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91770487) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 882357 + ... + 882460.

Almost surely, 2^91770484 is an apocalyptic number.

It is an amenable number.

91770484 is a deficient number, since it is larger than the sum of its proper divisors (81181680).

91770484 is a wasteful number, since it uses less digits than its factorization.

91770484 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1764834 (or 1764832 counting only the distinct ones).

The product of its (nonzero) digits is 56448, while the sum is 40.

The square root of 91770484 is about 9579.6912267567. The cubic root of 91770484 is about 451.0600261302.

The spelling of 91770484 in words is "ninety-one million, seven hundred seventy thousand, four hundred eighty-four".