68872613 has 2 divisors, whose sum is σ = 68872614. Its totient is φ = 68872612.

The previous prime is 68872591. The next prime is 68872621. The reversal of 68872613 is 31627886.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 45995524 + 22877089 = 6782^2 + 4783^2 .

It is a cyclic number.

It is not a de Polignac number, because 68872613 - 2²⁰ = 67824037 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68872633) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34436306 + 34436307.

It is an arithmetic number, because the mean of its divisors is an integer number (34436307).

Almost surely, 2^68872613 is an apocalyptic number.

It is an amenable number.

68872613 is a deficient number, since it is larger than the sum of its proper divisors (1).

68872613 is an equidigital number, since it uses as much as digits as its factorization.

68872613 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 96768, while the sum is 41.

The square root of 68872613 is about 8298.9525242647. The cubic root of 68872613 is about 409.9040286972.

The spelling of 68872613 in words is "sixty-eight million, eight hundred seventy-two thousand, six hundred thirteen".