74719939 has 24 divisors (see below), whose sum is σ = 91590912. Its totient is φ = 59598000.

The previous prime is 74719891. The next prime is 74719943. The reversal of 74719939 is 93991747.

It is a happy number.

It is not a de Polignac number, because 74719939 - 2⁹ = 74719427 is a prime.

Its product of digits (428652) is a multiple of the sum of its prime divisors (324).

It is a junction number, because it is equal to n+sod(n) for n = 74719892 and 74719901.

It is not an unprimeable number, because it can be changed into a prime (74719969) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 297564 + ... + 297814.

It is an arithmetic number, because the mean of its divisors is an integer number (3816288).

Almost surely, 2^74719939 is an apocalyptic number.

74719939 is a deficient number, since it is larger than the sum of its proper divisors (16870973).

74719939 is a wasteful number, since it uses less digits than its factorization.

74719939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 367 (or 324 counting only the distinct ones).

The product of its digits is 428652, while the sum is 49.

The square root of 74719939 is about 8644.0695855598. The cubic root of 74719939 is about 421.1907610406.

The spelling of 74719939 in words is "seventy-four million, seven hundred nineteen thousand, nine hundred thirty-nine".