72555449 has 2 divisors, whose sum is σ = 72555450. Its totient is φ = 72555448.

The previous prime is 72555443. The next prime is 72555493. The reversal of 72555449 is 94455527.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 63313849 + 9241600 = 7957^2 + 3040^2 .

It is a cyclic number.

It is not a de Polignac number, because 72555449 - 2⁸ = 72555193 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is equal to p_4259498 and since 72555449 and 4259498 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (72555443) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36277724 + 36277725.

It is an arithmetic number, because the mean of its divisors is an integer number (36277725).

Almost surely, 2^72555449 is an apocalyptic number.

It is an amenable number.

72555449 is a deficient number, since it is larger than the sum of its proper divisors (1).

72555449 is an equidigital number, since it uses as much as digits as its factorization.

72555449 is an evil number, because the sum of its binary digits is even.

The product of its digits is 252000, while the sum is 41.

The square root of 72555449 is about 8517.9486380231. The cubic root of 72555449 is about 417.0838220737.

The spelling of 72555449 in words is "seventy-two million, five hundred fifty-five thousand, four hundred forty-nine".