72207613 has 2 divisors, whose sum is σ = 72207614. Its totient is φ = 72207612.

The previous prime is 72207607. The next prime is 72207637. The reversal of 72207613 is 31670227.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 57790404 + 14417209 = 7602^2 + 3797^2 .

It is a cyclic number.

It is not a de Polignac number, because 72207613 - 2²¹ = 70110461 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72207413) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36103806 + 36103807.

It is an arithmetic number, because the mean of its divisors is an integer number (36103807).

Almost surely, 2^72207613 is an apocalyptic number.

It is an amenable number.

72207613 is a deficient number, since it is larger than the sum of its proper divisors (1).

72207613 is an equidigital number, since it uses as much as digits as its factorization.

72207613 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3528, while the sum is 28.

The square root of 72207613 is about 8497.5062812569. The cubic root of 72207613 is about 416.4162442606.

The spelling of 72207613 in words is "seventy-two million, two hundred seven thousand, six hundred thirteen".