72504239 has 2 divisors, whose sum is σ = 72504240. Its totient is φ = 72504238.

The previous prime is 72504217. The next prime is 72504283. The reversal of 72504239 is 93240527.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72504239 is a prime.

It is a Chen prime.

It is equal to p_4256645 and since 72504239 and 4256645 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72504139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36252119 + 36252120.

It is an arithmetic number, because the mean of its divisors is an integer number (36252120).

Almost surely, 2^72504239 is an apocalyptic number.

72504239 is a deficient number, since it is larger than the sum of its proper divisors (1).

72504239 is an equidigital number, since it uses as much as digits as its factorization.

72504239 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15120, while the sum is 32.

The square root of 72504239 is about 8514.9421019758. The cubic root of 72504239 is about 416.9856723603.

The spelling of 72504239 in words is "seventy-two million, five hundred four thousand, two hundred thirty-nine".