74173139 has 4 divisors (see below), whose sum is σ = 74229000. Its totient is φ = 74117280.

The previous prime is 74173103. The next prime is 74173147. The reversal of 74173139 is 93137147.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 93137147 = 1109 ⋅83983.

It is a cyclic number.

It is not a de Polignac number, because 74173139 - 2¹⁶ = 74107603 is a prime.

It is a super-2 number, since 2×74173139² = 11003309098226642, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 74173099 and 74173108.

It is not an unprimeable number, because it can be changed into a prime (74173339) 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, 25889 + ... + 28610.

It is an arithmetic number, because the mean of its divisors is an integer number (18557250).

Almost surely, 2^74173139 is an apocalyptic number.

74173139 is a deficient number, since it is larger than the sum of its proper divisors (55861).

74173139 is a wasteful number, since it uses less digits than its factorization.

74173139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55860.

The product of its digits is 15876, while the sum is 35.

The square root of 74173139 is about 8612.3828874476. The cubic root of 74173139 is about 420.1608208768.

The spelling of 74173139 in words is "seventy-four million, one hundred seventy-three thousand, one hundred thirty-nine".