68905019 has 2 divisors, whose sum is σ = 68905020. Its totient is φ = 68905018.

The previous prime is 68905009. The next prime is 68905021. The reversal of 68905019 is 91050986.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 68905019 - 2²⁰ = 67856443 is a prime.

It is a super-2 number, since 2×68905019² = 9495803286780722, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 68905021, 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 (68905009) 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, 34452509 + 34452510.

It is an arithmetic number, because the mean of its divisors is an integer number (34452510).

Almost surely, 2^68905019 is an apocalyptic number.

68905019 is a deficient number, since it is larger than the sum of its proper divisors (1).

68905019 is an equidigital number, since it uses as much as digits as its factorization.

68905019 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 19440, while the sum is 38.

The square root of 68905019 is about 8300.9047097289. The cubic root of 68905019 is about 409.9683080798.

The spelling of 68905019 in words is "sixty-eight million, nine hundred five thousand, nineteen".