74907979 has 2 divisors, whose sum is σ = 74907980. Its totient is φ = 74907978.

The previous prime is 74907971. The next prime is 74907983. The reversal of 74907979 is 97970947.

It is a strong prime.

It is an emirp because it is prime and its reverse (97970947) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 74907979 - 2³ = 74907971 is a prime.

It is a super-2 number, since 2×74907979² = 11222410635728882, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (74907971) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37453989 + 37453990.

It is an arithmetic number, because the mean of its divisors is an integer number (37453990).

Almost surely, 2^74907979 is an apocalyptic number.

74907979 is a deficient number, since it is larger than the sum of its proper divisors (1).

74907979 is an equidigital number, since it uses as much as digits as its factorization.

74907979 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1000188, while the sum is 52.

The square root of 74907979 is about 8654.9395722905. The cubic root of 74907979 is about 421.5437875809.

The spelling of 74907979 in words is "seventy-four million, nine hundred seven thousand, nine hundred seventy-nine".