74739789 has 6 divisors (see below), whose sum is σ = 107957486. Its totient is φ = 49826520.

The previous prime is 74739781. The next prime is 74739799. The reversal of 74739789 is 98793747.

74739789 is a `hidden beast` number, since 7 + 473 + 97 + 89 = 666.

It can be written as a sum of positive squares in only one way, i.e., 71064900 + 3674889 = 8430^2 + 1917^2 .

It is not a de Polignac number, because 74739789 - 2³ = 74739781 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74739781) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4152202 + ... + 4152219.

Almost surely, 2^74739789 is an apocalyptic number.

It is an amenable number.

74739789 is a deficient number, since it is larger than the sum of its proper divisors (33217697).

74739789 is a wasteful number, since it uses less digits than its factorization.

74739789 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8304427 (or 8304424 counting only the distinct ones).

The product of its digits is 2667168, while the sum is 54.

The square root of 74739789 is about 8645.2176953504. The cubic root of 74739789 is about 421.2280553981.

The spelling of 74739789 in words is "seventy-four million, seven hundred thirty-nine thousand, seven hundred eighty-nine".