389981719 has 2 divisors, whose sum is σ = 389981720. Its totient is φ = 389981718.

The previous prime is 389981689. The next prime is 389981773. The reversal of 389981719 is 917189983.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 389981719 - 2²³ = 381593111 is a prime.

It is a super-2 number, since 2×389981719² = 304171482308389922, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 389981719.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (329981719) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 194990859 + 194990860.

It is an arithmetic number, because the mean of its divisors is an integer number (194990860).

Almost surely, 2^389981719 is an apocalyptic number.

389981719 is a deficient number, since it is larger than the sum of its proper divisors (1).

389981719 is an equidigital number, since it uses as much as digits as its factorization.

389981719 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 979776, while the sum is 55.

The square root of 389981719 is about 19747.9548054982. The cubic root of 389981719 is about 730.6029415347.

The spelling of 389981719 in words is "three hundred eighty-nine million, nine hundred eighty-one thousand, seven hundred nineteen".