74455679 has 4 divisors (see below), whose sum is σ = 74473080. Its totient is φ = 74438280.

The previous prime is 74455657. The next prime is 74455691. The reversal of 74455679 is 97655447.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-74455679 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74455609) 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, 2684 + ... + 12494.

It is an arithmetic number, because the mean of its divisors is an integer number (18618270).

Almost surely, 2^74455679 is an apocalyptic number.

74455679 is a deficient number, since it is larger than the sum of its proper divisors (17401).

74455679 is an equidigital number, since it uses as much as digits as its factorization.

74455679 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17400.

The product of its digits is 1058400, while the sum is 47.

The square root of 74455679 is about 8628.7704222560. The cubic root of 74455679 is about 420.6936365088.

The spelling of 74455679 in words is "seventy-four million, four hundred fifty-five thousand, six hundred seventy-nine".