74239999 has 2 divisors, whose sum is σ = 74240000. Its totient is φ = 74239998.

The previous prime is 74239993. The next prime is 74240057. The reversal of 74239999 is 99993247.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 74239999 - 2⁵ = 74239967 is a prime.

74239999 is a modest number, since divided by 9999 gives 7423 as remainder.

It is a plaindrome in base 16.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (74239993) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37119999 + 37120000.

It is an arithmetic number, because the mean of its divisors is an integer number (37120000).

Almost surely, 2^74239999 is an apocalyptic number.

74239999 is a deficient number, since it is larger than the sum of its proper divisors (1).

74239999 is an equidigital number, since it uses as much as digits as its factorization.

74239999 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1102248, while the sum is 52.

The square root of 74239999 is about 8616.2636333854. The cubic root of 74239999 is about 420.2870279124.

The spelling of 74239999 in words is "seventy-four million, two hundred thirty-nine thousand, nine hundred ninety-nine".