72957641 has 2 divisors, whose sum is σ = 72957642. Its totient is φ = 72957640.

The previous prime is 72957623. The next prime is 72957697. The reversal of 72957641 is 14675927.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 40513225 + 32444416 = 6365^2 + 5696^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72957641 is a prime.

It is not a weakly prime, because it can be changed into another prime (72957341) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36478820 + 36478821.

It is an arithmetic number, because the mean of its divisors is an integer number (36478821).

Almost surely, 2^72957641 is an apocalyptic number.

It is an amenable number.

72957641 is a deficient number, since it is larger than the sum of its proper divisors (1).

72957641 is an equidigital number, since it uses as much as digits as its factorization.

72957641 is an evil number, because the sum of its binary digits is even.

The product of its digits is 105840, while the sum is 41.

The square root of 72957641 is about 8541.5245126382. The cubic root of 72957641 is about 417.8530671807.

The spelling of 72957641 in words is "seventy-two million, nine hundred fifty-seven thousand, six hundred forty-one".