74517139 has 2 divisors, whose sum is σ = 74517140. Its totient is φ = 74517138.

The previous prime is 74517133. The next prime is 74517161. The reversal of 74517139 is 93171547.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 74517139 - 2¹⁹ = 73992851 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 74517098 and 74517107.

It is not a weakly prime, because it can be changed into another prime (74517133) 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 as a sum of consecutive naturals, namely, 37258569 + 37258570.

It is an arithmetic number, because the mean of its divisors is an integer number (37258570).

Almost surely, 2^74517139 is an apocalyptic number.

74517139 is a deficient number, since it is larger than the sum of its proper divisors (1).

74517139 is an equidigital number, since it uses as much as digits as its factorization.

74517139 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 26460, while the sum is 37.

The square root of 74517139 is about 8632.3310293338. The cubic root of 74517139 is about 420.8093595815.

The spelling of 74517139 in words is "seventy-four million, five hundred seventeen thousand, one hundred thirty-nine".