72365641 has 2 divisors, whose sum is σ = 72365642. Its totient is φ = 72365640.

The previous prime is 72365639. The next prime is 72365669. The reversal of 72365641 is 14656327.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 41229241 + 31136400 = 6421^2 + 5580^2 .

It is a cyclic number.

It is not a de Polignac number, because 72365641 - 2¹ = 72365639 is a prime.

Together with 72365639, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 72365597 and 72365606.

It is not a weakly prime, because it can be changed into another prime (72365611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36182820 + 36182821.

It is an arithmetic number, because the mean of its divisors is an integer number (36182821).

Almost surely, 2^72365641 is an apocalyptic number.

It is an amenable number.

72365641 is a deficient number, since it is larger than the sum of its proper divisors (1).

72365641 is an equidigital number, since it uses as much as digits as its factorization.

72365641 is an evil number, because the sum of its binary digits is even.

The product of its digits is 30240, while the sum is 34.

The square root of 72365641 is about 8506.7996920111. The cubic root of 72365641 is about 416.7198017215.

The spelling of 72365641 in words is "seventy-two million, three hundred sixty-five thousand, six hundred forty-one".