74920239 has 6 divisors (see below), whose sum is σ = 108218136. Its totient is φ = 49946820.

The previous prime is 74920201. The next prime is 74920277. The reversal of 74920239 is 93202947.

It is an interprime number because it is at equal distance from previous prime (74920201) and next prime (74920277).

It is not a de Polignac number, because 74920239 - 2⁹ = 74919727 is a prime.

It is a super-2 number, since 2×74920239² = 11226084423634242, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74920639) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4162227 + ... + 4162244.

It is an arithmetic number, because the mean of its divisors is an integer number (18036356).

Almost surely, 2^74920239 is an apocalyptic number.

74920239 is a deficient number, since it is larger than the sum of its proper divisors (33297897).

74920239 is a wasteful number, since it uses less digits than its factorization.

74920239 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8324477 (or 8324474 counting only the distinct ones).

The product of its (nonzero) digits is 27216, while the sum is 36.

The square root of 74920239 is about 8655.6478093786. The cubic root of 74920239 is about 421.5667839959.

The spelling of 74920239 in words is "seventy-four million, nine hundred twenty thousand, two hundred thirty-nine".