389343917 has 2 divisors, whose sum is σ = 389343918. Its totient is φ = 389343916.

The previous prime is 389343881. The next prime is 389343943. The reversal of 389343917 is 719343983.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 369754441 + 19589476 = 19229^2 + 4426^2 .

It is a cyclic number.

It is not a de Polignac number, because 389343917 - 2¹⁸ = 389081773 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (389343217) 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, 194671958 + 194671959.

It is an arithmetic number, because the mean of its divisors is an integer number (194671959).

Almost surely, 2^389343917 is an apocalyptic number.

It is an amenable number.

389343917 is a deficient number, since it is larger than the sum of its proper divisors (1).

389343917 is an equidigital number, since it uses as much as digits as its factorization.

389343917 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 489888, while the sum is 47.

The square root of 389343917 is about 19731.7996391611. The cubic root of 389343917 is about 730.2044320173.

The spelling of 389343917 in words is "three hundred eighty-nine million, three hundred forty-three thousand, nine hundred seventeen".