68808613 has 2 divisors, whose sum is σ = 68808614. Its totient is φ = 68808612.

The previous prime is 68808563. The next prime is 68808629. The reversal of 68808613 is 31680886.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 65561409 + 3247204 = 8097^2 + 1802^2 .

It is a cyclic number.

It is not a de Polignac number, because 68808613 - 2¹⁷ = 68677541 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68808683) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34404306 + 34404307.

It is an arithmetic number, because the mean of its divisors is an integer number (34404307).

Almost surely, 2^68808613 is an apocalyptic number.

It is an amenable number.

68808613 is a deficient number, since it is larger than the sum of its proper divisors (1).

68808613 is an equidigital number, since it uses as much as digits as its factorization.

68808613 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 55296, while the sum is 40.

The square root of 68808613 is about 8295.0957197612. The cubic root of 68808613 is about 409.7770213288. Note that the first 3 decimals are identical.

The spelling of 68808613 in words is "sixty-eight million, eight hundred eight thousand, six hundred thirteen".