72576737 has 2 divisors, whose sum is σ = 72576738. Its totient is φ = 72576736.

The previous prime is 72576731. The next prime is 72576739. The reversal of 72576737 is 73767527.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 62742241 + 9834496 = 7921^2 + 3136^2 .

It is a cyclic number.

It is not a de Polignac number, because 72576737 - 2⁸ = 72576481 is a prime.

Together with 72576739, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (72576731) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36288368 + 36288369.

It is an arithmetic number, because the mean of its divisors is an integer number (36288369).

Almost surely, 2^72576737 is an apocalyptic number.

It is an amenable number.

72576737 is a deficient number, since it is larger than the sum of its proper divisors (1).

72576737 is an equidigital number, since it uses as much as digits as its factorization.

72576737 is an evil number, because the sum of its binary digits is even.

The product of its digits is 432180, while the sum is 44.

The square root of 72576737 is about 8519.1981430179. The cubic root of 72576737 is about 417.1246093258.

The spelling of 72576737 in words is "seventy-two million, five hundred seventy-six thousand, seven hundred thirty-seven".