168989719 has 2 divisors, whose sum is σ = 168989720. Its totient is φ = 168989718.

The previous prime is 168989683. The next prime is 168989789. The reversal of 168989719 is 917989861.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 168989719 - 2⁹ = 168989207 is a prime.

It is a super-2 number, since 2×168989719² = 57115050255397922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (168989789) 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, 84494859 + 84494860.

It is an arithmetic number, because the mean of its divisors is an integer number (84494860).

Almost surely, 2^168989719 is an apocalyptic number.

168989719 is a deficient number, since it is larger than the sum of its proper divisors (1).

168989719 is an equidigital number, since it uses as much as digits as its factorization.

168989719 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1959552, while the sum is 58.

The square root of 168989719 is about 12999.6045709091. The cubic root of 168989719 is about 552.8662698321.

The spelling of 168989719 in words is "one hundred sixty-eight million, nine hundred eighty-nine thousand, seven hundred nineteen".