74725531939 has 2 divisors, whose sum is σ = 74725531940. Its totient is φ = 74725531938.

The previous prime is 74725531931. The next prime is 74725531957. The reversal of 74725531939 is 93913552747.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 74725531939 - 2³ = 74725531931 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 74725531939.

It is not a weakly prime, because it can be changed into another prime (74725531931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37362765969 + 37362765970.

It is an arithmetic number, because the mean of its divisors is an integer number (37362765970).

Almost surely, 2^74725531939 is an apocalyptic number.

74725531939 is a deficient number, since it is larger than the sum of its proper divisors (1).

74725531939 is an equidigital number, since it uses as much as digits as its factorization.

74725531939 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7144200, while the sum is 55.

The spelling of 74725531939 in words is "seventy-four billion, seven hundred twenty-five million, five hundred thirty-one thousand, nine hundred thirty-nine".