72708197 has 2 divisors, whose sum is σ = 72708198. Its totient is φ = 72708196.

The previous prime is 72708179. The next prime is 72708239. The reversal of 72708197 is 79180727.

Together with previous prime (72708179) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 60310756 + 12397441 = 7766^2 + 3521^2 .

It is a cyclic number.

It is not a de Polignac number, because 72708197 - 2⁸ = 72707941 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72708397) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36354098 + 36354099.

It is an arithmetic number, because the mean of its divisors is an integer number (36354099).

Almost surely, 2^72708197 is an apocalyptic number.

It is an amenable number.

72708197 is a deficient number, since it is larger than the sum of its proper divisors (1).

72708197 is an equidigital number, since it uses as much as digits as its factorization.

72708197 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 49392, while the sum is 41.

The square root of 72708197 is about 8526.9101672294. The cubic root of 72708197 is about 417.3763067180.

The spelling of 72708197 in words is "seventy-two million, seven hundred eight thousand, one hundred ninety-seven".