68979019 has 2 divisors, whose sum is σ = 68979020. Its totient is φ = 68979018.

The previous prime is 68979017. The next prime is 68979109. The reversal of 68979019 is 91097986.

Together with next prime (68979109) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 68979019 - 2¹ = 68979017 is a prime.

It is a super-2 number, since 2×68979019² = 9516210124404722, which contains 22 as substring.

Together with 68979017, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (68979017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34489509 + 34489510.

It is an arithmetic number, because the mean of its divisors is an integer number (34489510).

Almost surely, 2^68979019 is an apocalyptic number.

68979019 is a deficient number, since it is larger than the sum of its proper divisors (1).

68979019 is an equidigital number, since it uses as much as digits as its factorization.

68979019 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 244944, while the sum is 49.

The square root of 68979019 is about 8305.3608591078. The cubic root of 68979019 is about 410.1150163139.

The spelling of 68979019 in words is "sixty-eight million, nine hundred seventy-nine thousand, nineteen".