72370817 has 2 divisors, whose sum is σ = 72370818. Its totient is φ = 72370816.

The previous prime is 72370801. The next prime is 72370889. The reversal of 72370817 is 71807327.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 63984001 + 8386816 = 7999^2 + 2896^2 .

It is a cyclic number.

It is not a de Polignac number, because 72370817 - 2⁴ = 72370801 is a prime.

It is not a weakly prime, because it can be changed into another prime (72370897) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36185408 + 36185409.

It is an arithmetic number, because the mean of its divisors is an integer number (36185409).

Almost surely, 2^72370817 is an apocalyptic number.

It is an amenable number.

72370817 is a deficient number, since it is larger than the sum of its proper divisors (1).

72370817 is an equidigital number, since it uses as much as digits as its factorization.

72370817 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16464, while the sum is 35.

The square root of 72370817 is about 8507.1039137888. The cubic root of 72370817 is about 416.7297368705.

The spelling of 72370817 in words is "seventy-two million, three hundred seventy thousand, eight hundred seventeen".