72997625 has 8 divisors (see below), whose sum is σ = 91101192. Its totient is φ = 58398000.

The previous prime is 72997619. The next prime is 72997693. The reversal of 72997625 is 52679927.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 19882681 + 53114944 = 4459^2 + 7288^2 .

It is not a de Polignac number, because 72997625 - 2⁸ = 72997369 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 72997625.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 291866 + ... + 292115.

It is an arithmetic number, because the mean of its divisors is an integer number (11387649).

Almost surely, 2^72997625 is an apocalyptic number.

It is an amenable number.

72997625 is a deficient number, since it is larger than the sum of its proper divisors (18103567).

72997625 is an equidigital number, since it uses as much as digits as its factorization.

72997625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 583996 (or 583986 counting only the distinct ones).

The product of its digits is 476280, while the sum is 47.

The square root of 72997625 is about 8543.8647578248. The cubic root of 72997625 is about 417.9293872006.

The spelling of 72997625 in words is "seventy-two million, nine hundred ninety-seven thousand, six hundred twenty-five".