68868979 has 2 divisors, whose sum is σ = 68868980. Its totient is φ = 68868978.

The previous prime is 68868937. The next prime is 68869013. The reversal of 68868979 is 97986886.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 68868979 - 2⁷ = 68868851 is a prime.

It is not a weakly prime, because it can be changed into another prime (68863979) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34434489 + 34434490.

It is an arithmetic number, because the mean of its divisors is an integer number (34434490).

Almost surely, 2^68868979 is an apocalyptic number.

68868979 is a deficient number, since it is larger than the sum of its proper divisors (1).

68868979 is an equidigital number, since it uses as much as digits as its factorization.

68868979 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10450944, while the sum is 61.

The square root of 68868979 is about 8298.7335780829. The cubic root of 68868979 is about 409.8968191675.

The spelling of 68868979 in words is "sixty-eight million, eight hundred sixty-eight thousand, nine hundred seventy-nine".