74623139 has 2 divisors, whose sum is σ = 74623140. Its totient is φ = 74623138.

The previous prime is 74623111. The next prime is 74623181. The reversal of 74623139 is 93132647.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 74623139 - 2⁸ = 74622883 is a prime.

It is a super-2 number, since 2×74623139² = 11137225748426642, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 74623099 and 74623108.

It is not a weakly prime, because it can be changed into another prime (74625139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37311569 + 37311570.

It is an arithmetic number, because the mean of its divisors is an integer number (37311570).

Almost surely, 2^74623139 is an apocalyptic number.

74623139 is a deficient number, since it is larger than the sum of its proper divisors (1).

74623139 is an equidigital number, since it uses as much as digits as its factorization.

74623139 is an evil number, because the sum of its binary digits is even.

The product of its digits is 27216, while the sum is 35.

The square root of 74623139 is about 8638.4685564051. The cubic root of 74623139 is about 421.0087976301.

It can be divided in two parts, 7462 and 3139, that added together give a palindrome (10601).

The spelling of 74623139 in words is "seventy-four million, six hundred twenty-three thousand, one hundred thirty-nine".