74644939 has 4 divisors (see below), whose sum is σ = 78573640. Its totient is φ = 70716240.

The previous prime is 74644937. The next prime is 74644949. The reversal of 74644939 is 93944647.

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 74644939 - 2¹ = 74644937 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (74644937) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1964322 + ... + 1964359.

It is an arithmetic number, because the mean of its divisors is an integer number (19643410).

Almost surely, 2^74644939 is an apocalyptic number.

74644939 is a deficient number, since it is larger than the sum of its proper divisors (3928701).

74644939 is a wasteful number, since it uses less digits than its factorization.

74644939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3928700.

The product of its digits is 653184, while the sum is 46.

The square root of 74644939 is about 8639.7302619931. The cubic root of 74644939 is about 421.0497907158.

It can be divided in two parts, 7464 and 4939, that added together give a triangular number (12403 = T₁₅₇).

The spelling of 74644939 in words is "seventy-four million, six hundred forty-four thousand, nine hundred thirty-nine".