74789091 has 18 divisors (see below), whose sum is σ = 116980188. Its totient is φ = 46023120.

The previous prime is 74789087. The next prime is 74789101. The reversal of 74789091 is 19098747.

74789091 is a `hidden beast` number, since 7 + 478 + 90 + 91 = 666.

It is not a de Polignac number, because 74789091 - 2² = 74789087 is a prime.

It is not an unprimeable number, because it can be changed into a prime (74789291) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 23065 + ... + 26106.

Almost surely, 2^74789091 is an apocalyptic number.

74789091 is a deficient number, since it is larger than the sum of its proper divisors (42191097).

74789091 is a wasteful number, since it uses less digits than its factorization.

74789091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49203 (or 49187 counting only the distinct ones).

The product of its (nonzero) digits is 127008, while the sum is 45.

The square root of 74789091 is about 8648.0686283123. The cubic root of 74789091 is about 421.3206558775.

The spelling of 74789091 in words is "seventy-four million, seven hundred eighty-nine thousand, ninety-one".