389912317 has 2 divisors, whose sum is σ = 389912318. Its totient is φ = 389912316.

The previous prime is 389912273. The next prime is 389912377. The reversal of 389912317 is 713219983.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 328116996 + 61795321 = 18114^2 + 7861^2 .

It is a cyclic number.

It is not a de Polignac number, because 389912317 - 2⁷ = 389912189 is a prime.

It is a super-2 number, since 2×389912317² = 304063229896616978, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (389912377) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 194956158 + 194956159.

It is an arithmetic number, because the mean of its divisors is an integer number (194956159).

Almost surely, 2^389912317 is an apocalyptic number.

It is an amenable number.

389912317 is a deficient number, since it is larger than the sum of its proper divisors (1).

389912317 is an equidigital number, since it uses as much as digits as its factorization.

389912317 is an evil number, because the sum of its binary digits is even.

The product of its digits is 81648, while the sum is 43.

The square root of 389912317 is about 19746.1975326897. The cubic root of 389912317 is about 730.5595990641.

The spelling of 389912317 in words is "three hundred eighty-nine million, nine hundred twelve thousand, three hundred seventeen".