72321597 has 6 divisors (see below), whose sum is σ = 104464542. Its totient is φ = 48214392.

The previous prime is 72321541. The next prime is 72321617. The reversal of 72321597 is 79512327.

It can be written as a sum of positive squares in only one way, i.e., 50893956 + 21427641 = 7134^2 + 4629^2 .

It is not a de Polignac number, because 72321597 - 2⁶ = 72321533 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72321517) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4017858 + ... + 4017875.

It is an arithmetic number, because the mean of its divisors is an integer number (17410757).

Almost surely, 2^72321597 is an apocalyptic number.

It is an amenable number.

72321597 is a deficient number, since it is larger than the sum of its proper divisors (32142945).

72321597 is a wasteful number, since it uses less digits than its factorization.

72321597 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8035739 (or 8035736 counting only the distinct ones).

The product of its digits is 26460, while the sum is 36.

The square root of 72321597 is about 8504.2105453710. The cubic root of 72321597 is about 416.6352416478.

The spelling of 72321597 in words is "seventy-two million, three hundred twenty-one thousand, five hundred ninety-seven".