74240539 has 2 divisors, whose sum is σ = 74240540. Its totient is φ = 74240538.

The previous prime is 74240533. The next prime is 74240563. The reversal of 74240539 is 93504247.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 74240539 - 2³ = 74240531 is a prime.

It is not a weakly prime, because it can be changed into another prime (74240531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37120269 + 37120270.

It is an arithmetic number, because the mean of its divisors is an integer number (37120270).

Almost surely, 2^74240539 is an apocalyptic number.

74240539 is a deficient number, since it is larger than the sum of its proper divisors (1).

74240539 is an equidigital number, since it uses as much as digits as its factorization.

74240539 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 30240, while the sum is 34.

The square root of 74240539 is about 8616.2949694170. The cubic root of 74240539 is about 420.2880469248.

The spelling of 74240539 in words is "seventy-four million, two hundred forty thousand, five hundred thirty-nine".