74966139 has 12 divisors (see below), whose sum is σ = 109357872. Its totient is φ = 49482000.

The previous prime is 74966123. The next prime is 74966147. The reversal of 74966139 is 93166947.

It is not a de Polignac number, because 74966139 - 2⁴ = 74966123 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 74966094 and 74966103.

It is not an unprimeable number, because it can be changed into a prime (74966149) 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 11 ways as a sum of consecutive naturals, for example, 40327 + ... + 42144.

It is an arithmetic number, because the mean of its divisors is an integer number (9113156).

Almost surely, 2^74966139 is an apocalyptic number.

74966139 is a deficient number, since it is larger than the sum of its proper divisors (34391733).

74966139 is a wasteful number, since it uses less digits than its factorization.

74966139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82578 (or 82575 counting only the distinct ones).

The product of its digits is 244944, while the sum is 45.

The square root of 74966139 is about 8658.2988513911. The cubic root of 74966139 is about 421.6528576007.

It can be divided in two parts, 749661 and 39, that added together give a triangular number (749700 = T₁₂₂₄).

The spelling of 74966139 in words is "seventy-four million, nine hundred sixty-six thousand, one hundred thirty-nine".