72949549 has 2 divisors, whose sum is σ = 72949550. Its totient is φ = 72949548.

The previous prime is 72949517. The next prime is 72949633. The reversal of 72949549 is 94594927.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 65496649 + 7452900 = 8093^2 + 2730^2 .

It is a cyclic number.

It is not a de Polignac number, because 72949549 - 2⁵ = 72949517 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72949049) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36474774 + 36474775.

It is an arithmetic number, because the mean of its divisors is an integer number (36474775).

Almost surely, 2^72949549 is an apocalyptic number.

It is an amenable number.

72949549 is a deficient number, since it is larger than the sum of its proper divisors (1).

72949549 is an equidigital number, since it uses as much as digits as its factorization.

72949549 is an evil number, because the sum of its binary digits is even.

The product of its digits is 816480, while the sum is 49.

The square root of 72949549 is about 8541.0508135709. The cubic root of 72949549 is about 417.8376180699.

The spelling of 72949549 in words is "seventy-two million, nine hundred forty-nine thousand, five hundred forty-nine".