389657117 has 2 divisors, whose sum is σ = 389657118. Its totient is φ = 389657116.

The previous prime is 389657087. The next prime is 389657123. The reversal of 389657117 is 711756983.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 381850681 + 7806436 = 19541^2 + 2794^2 .

It is a cyclic number.

It is not a de Polignac number, because 389657117 - 2¹² = 389653021 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (389657167) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 194828558 + 194828559.

It is an arithmetic number, because the mean of its divisors is an integer number (194828559).

Almost surely, 2^389657117 is an apocalyptic number.

It is an amenable number.

389657117 is a deficient number, since it is larger than the sum of its proper divisors (1).

389657117 is an equidigital number, since it uses as much as digits as its factorization.

389657117 is an evil number, because the sum of its binary digits is even.

The product of its digits is 317520, while the sum is 47.

The square root of 389657117 is about 19739.7344713651. The cubic root of 389657117 is about 730.4001790343.

The spelling of 389657117 in words is "three hundred eighty-nine million, six hundred fifty-seven thousand, one hundred seventeen".