74389939 has 4 divisors (see below), whose sum is σ = 80112256. Its totient is φ = 68667624.

The previous prime is 74389907. The next prime is 74389961. The reversal of 74389939 is 93998347.

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

It is a cyclic number.

It is not a de Polignac number, because 74389939 - 2⁵ = 74389907 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (74389969) 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, 2861139 + ... + 2861164.

It is an arithmetic number, because the mean of its divisors is an integer number (20028064).

Almost surely, 2^74389939 is an apocalyptic number.

74389939 is a deficient number, since it is larger than the sum of its proper divisors (5722317).

74389939 is a wasteful number, since it uses less digits than its factorization.

74389939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5722316.

The product of its digits is 1469664, while the sum is 52.

The square root of 74389939 is about 8624.9602317924. The cubic root of 74389939 is about 420.5697841101.

The spelling of 74389939 in words is "seventy-four million, three hundred eighty-nine thousand, nine hundred thirty-nine".