389405117 has 2 divisors, whose sum is σ = 389405118. Its totient is φ = 389405116.

The previous prime is 389405087. The next prime is 389405123. The reversal of 389405117 is 711504983.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 383924836 + 5480281 = 19594^2 + 2341^2 .

It is a cyclic number.

It is not a de Polignac number, because 389405117 - 2¹⁴ = 389388733 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (389405147) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 194702558 + 194702559.

It is an arithmetic number, because the mean of its divisors is an integer number (194702559).

Almost surely, 2^389405117 is an apocalyptic number.

It is an amenable number.

389405117 is a deficient number, since it is larger than the sum of its proper divisors (1).

389405117 is an equidigital number, since it uses as much as digits as its factorization.

389405117 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 30240, while the sum is 38.

The square root of 389405117 is about 19733.3503744296. The cubic root of 389405117 is about 730.2426896844.

The spelling of 389405117 in words is "three hundred eighty-nine million, four hundred five thousand, one hundred seventeen".