74284979 has 4 divisors (see below), whose sum is σ = 76846560. Its totient is φ = 71723400.

The previous prime is 74284933. The next prime is 74284981. The reversal of 74284979 is 97948247.

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 74284979 - 2⁸ = 74284723 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (74284919) 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, 1280747 + ... + 1280804.

It is an arithmetic number, because the mean of its divisors is an integer number (19211640).

Almost surely, 2^74284979 is an apocalyptic number.

74284979 is a deficient number, since it is larger than the sum of its proper divisors (2561581).

74284979 is a wasteful number, since it uses less digits than its factorization.

74284979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2561580.

The product of its digits is 1016064, while the sum is 50.

The square root of 74284979 is about 8618.8734182606. The cubic root of 74284979 is about 420.3718909428.

The spelling of 74284979 in words is "seventy-four million, two hundred eighty-four thousand, nine hundred seventy-nine".