72504449 has 2 divisors, whose sum is σ = 72504450. Its totient is φ = 72504448.

The previous prime is 72504433. The next prime is 72504457. The reversal of 72504449 is 94440527.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 68178049 + 4326400 = 8257^2 + 2080^2 .

It is a cyclic number.

It is not a de Polignac number, because 72504449 - 2⁴ = 72504433 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (72504499) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36252224 + 36252225.

It is an arithmetic number, because the mean of its divisors is an integer number (36252225).

Almost surely, 2^72504449 is an apocalyptic number.

It is an amenable number.

72504449 is a deficient number, since it is larger than the sum of its proper divisors (1).

72504449 is an equidigital number, since it uses as much as digits as its factorization.

72504449 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 40320, while the sum is 35.

The square root of 72504449 is about 8514.9544332310. The cubic root of 72504449 is about 416.9860749433.

The spelling of 72504449 in words is "seventy-two million, five hundred four thousand, four hundred forty-nine".