68824979 has 2 divisors, whose sum is σ = 68824980. Its totient is φ = 68824978.

The previous prime is 68824961. The next prime is 68824981. The reversal of 68824979 is 97942886.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 68824979 - 2¹² = 68820883 is a prime.

Together with 68824981, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 68824979.

It is not a weakly prime, because it can be changed into another prime (68824919) 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, 34412489 + 34412490.

It is an arithmetic number, because the mean of its divisors is an integer number (34412490).

Almost surely, 2^68824979 is an apocalyptic number.

68824979 is a deficient number, since it is larger than the sum of its proper divisors (1).

68824979 is an equidigital number, since it uses as much as digits as its factorization.

68824979 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1741824, while the sum is 53.

The square root of 68824979 is about 8296.0821476164. The cubic root of 68824979 is about 409.8095069863.

The spelling of 68824979 in words is "sixty-eight million, eight hundred twenty-four thousand, nine hundred seventy-nine".