74856739 has 2 divisors, whose sum is σ = 74856740. Its totient is φ = 74856738.

The previous prime is 74856707. The next prime is 74856779. The reversal of 74856739 is 93765847.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 74856739 - 2⁵ = 74856707 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 74856692 and 74856701.

It is not a weakly prime, because it can be changed into another prime (74856779) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37428369 + 37428370.

It is an arithmetic number, because the mean of its divisors is an integer number (37428370).

Almost surely, 2^74856739 is an apocalyptic number.

74856739 is a deficient number, since it is larger than the sum of its proper divisors (1).

74856739 is an equidigital number, since it uses as much as digits as its factorization.

74856739 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1270080, while the sum is 49.

The square root of 74856739 is about 8651.9789065855. The cubic root of 74856739 is about 421.4476481536.

The spelling of 74856739 in words is "seventy-four million, eight hundred fifty-six thousand, seven hundred thirty-nine".