68985619 has 2 divisors, whose sum is σ = 68985620. Its totient is φ = 68985618.

The previous prime is 68985607. The next prime is 68985733. The reversal of 68985619 is 91658986.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 68985619 - 2⁷ = 68985491 is a prime.

It is a super-2 number, since 2×68985619² = 9518031257626322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (68985419) 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, 34492809 + 34492810.

It is an arithmetic number, because the mean of its divisors is an integer number (34492810).

Almost surely, 2^68985619 is an apocalyptic number.

68985619 is a deficient number, since it is larger than the sum of its proper divisors (1).

68985619 is an equidigital number, since it uses as much as digits as its factorization.

68985619 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 933120, while the sum is 52.

The square root of 68985619 is about 8305.7581833328. The cubic root of 68985619 is about 410.1280960050.

The spelling of 68985619 in words is "sixty-eight million, nine hundred eighty-five thousand, six hundred nineteen".