72713549 has 2 divisors, whose sum is σ = 72713550. Its totient is φ = 72713548.

The previous prime is 72713521. The next prime is 72713567. The reversal of 72713549 is 94531727.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 68641225 + 4072324 = 8285^2 + 2018^2 .

It is a cyclic number.

It is not a de Polignac number, because 72713549 - 2⁸ = 72713293 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 (72713519) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36356774 + 36356775.

It is an arithmetic number, because the mean of its divisors is an integer number (36356775).

Almost surely, 2^72713549 is an apocalyptic number.

It is an amenable number.

72713549 is a deficient number, since it is larger than the sum of its proper divisors (1).

72713549 is an equidigital number, since it uses as much as digits as its factorization.

72713549 is an evil number, because the sum of its binary digits is even.

The product of its digits is 52920, while the sum is 38.

The square root of 72713549 is about 8527.2239914289. The cubic root of 72713549 is about 417.3865473937.

The spelling of 72713549 in words is "seventy-two million, seven hundred thirteen thousand, five hundred forty-nine".