74785679 has 2 divisors, whose sum is σ = 74785680. Its totient is φ = 74785678.

The previous prime is 74785661. The next prime is 74785709. The reversal of 74785679 is 97658747.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-74785679 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 74785679.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (74785979) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37392839 + 37392840.

It is an arithmetic number, because the mean of its divisors is an integer number (37392840).

Almost surely, 2^74785679 is an apocalyptic number.

74785679 is a deficient number, since it is larger than the sum of its proper divisors (1).

74785679 is an equidigital number, since it uses as much as digits as its factorization.

74785679 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2963520, while the sum is 53.

The square root of 74785679 is about 8647.8713565825. The cubic root of 74785679 is about 421.3142486688.

The spelling of 74785679 in words is "seventy-four million, seven hundred eighty-five thousand, six hundred seventy-nine".