74990689 has 4 divisors (see below), whose sum is σ = 79401924. Its totient is φ = 70579456.

The previous prime is 74990687. The next prime is 74990693. The reversal of 74990689 is 98609947.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 64641600 + 10349089 = 8040^2 + 3217^2 .

It is a cyclic number.

It is not a de Polignac number, because 74990689 - 2¹ = 74990687 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (74990683) 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, 2205592 + ... + 2205625.

It is an arithmetic number, because the mean of its divisors is an integer number (19850481).

Almost surely, 2^74990689 is an apocalyptic number.

It is an amenable number.

74990689 is a deficient number, since it is larger than the sum of its proper divisors (4411235).

74990689 is a wasteful number, since it uses less digits than its factorization.

74990689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4411234.

The product of its (nonzero) digits is 979776, while the sum is 52.

The square root of 74990689 is about 8659.7164503233. The cubic root of 74990689 is about 421.6988803696.

The spelling of 74990689 in words is "seventy-four million, nine hundred ninety thousand, six hundred eighty-nine".