74648579 has 2 divisors, whose sum is σ = 74648580. Its totient is φ = 74648578.

The previous prime is 74648551. The next prime is 74648597. The reversal of 74648579 is 97584647.

Together with next prime (74648597) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 74648579 - 2²⁰ = 73600003 is a prime.

It is not a weakly prime, because it can be changed into another prime (74648599) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37324289 + 37324290.

It is an arithmetic number, because the mean of its divisors is an integer number (37324290).

Almost surely, 2^74648579 is an apocalyptic number.

74648579 is a deficient number, since it is larger than the sum of its proper divisors (1).

74648579 is an equidigital number, since it uses as much as digits as its factorization.

74648579 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1693440, while the sum is 50.

The square root of 74648579 is about 8639.9409141498. The cubic root of 74648579 is about 421.0566346552.

The spelling of 74648579 in words is "seventy-four million, six hundred forty-eight thousand, five hundred seventy-nine".