72870697 has 2 divisors, whose sum is σ = 72870698. Its totient is φ = 72870696.

The previous prime is 72870689. The next prime is 72870701. The reversal of 72870697 is 79607827.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 63744256 + 9126441 = 7984^2 + 3021^2 .

It is a cyclic number.

It is not a de Polignac number, because 72870697 - 2³ = 72870689 is a prime.

It is not a weakly prime, because it can be changed into another prime (72870397) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36435348 + 36435349.

It is an arithmetic number, because the mean of its divisors is an integer number (36435349).

Almost surely, 2^72870697 is an apocalyptic number.

It is an amenable number.

72870697 is a deficient number, since it is larger than the sum of its proper divisors (1).

72870697 is an equidigital number, since it uses as much as digits as its factorization.

72870697 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 296352, while the sum is 46.

The square root of 72870697 is about 8536.4335058618. The cubic root of 72870697 is about 417.6870153109.

The spelling of 72870697 in words is "seventy-two million, eight hundred seventy thousand, six hundred ninety-seven".