74739989 has 4 divisors (see below), whose sum is σ = 77317260. Its totient is φ = 72162720.

The previous prime is 74739971. The next prime is 74739997. The reversal of 74739989 is 98993747.

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 49589764 + 25150225 = 7042^2 + 5015^2 .

It is a cyclic number.

It is not a de Polignac number, because 74739989 - 2⁸ = 74739733 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 (74739689) 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, 1288592 + ... + 1288649.

It is an arithmetic number, because the mean of its divisors is an integer number (19329315).

Almost surely, 2^74739989 is an apocalyptic number.

It is an amenable number.

74739989 is a deficient number, since it is larger than the sum of its proper divisors (2577271).

74739989 is a wasteful number, since it uses less digits than its factorization.

74739989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2577270.

The product of its digits is 3429216, while the sum is 56.

The square root of 74739989 is about 8645.2292624314. The cubic root of 74739989 is about 421.2284311263.

The spelling of 74739989 in words is "seventy-four million, seven hundred thirty-nine thousand, nine hundred eighty-nine".