74439979 has 2 divisors, whose sum is σ = 74439980. Its totient is φ = 74439978.

The previous prime is 74439973. The next prime is 74440039. The reversal of 74439979 is 97993447.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 74439979 - 2¹¹ = 74437931 is a prime.

It is not a weakly prime, because it can be changed into another prime (74439973) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37219989 + 37219990.

It is an arithmetic number, because the mean of its divisors is an integer number (37219990).

Almost surely, 2^74439979 is an apocalyptic number.

74439979 is a deficient number, since it is larger than the sum of its proper divisors (1).

74439979 is an equidigital number, since it uses as much as digits as its factorization.

74439979 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1714608, while the sum is 52.

The square root of 74439979 is about 8627.8606270616. The cubic root of 74439979 is about 420.6640647578.

The spelling of 74439979 in words is "seventy-four million, four hundred thirty-nine thousand, nine hundred seventy-nine".