389581117 has 2 divisors, whose sum is σ = 389581118. Its totient is φ = 389581116.

The previous prime is 389581109. The next prime is 389581121. The reversal of 389581117 is 711185983.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 301577956 + 88003161 = 17366^2 + 9381^2 .

It is a cyclic number.

It is not a de Polignac number, because 389581117 - 2³ = 389581109 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (389581147) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 194790558 + 194790559.

It is an arithmetic number, because the mean of its divisors is an integer number (194790559).

Almost surely, 2^389581117 is an apocalyptic number.

It is an amenable number.

389581117 is a deficient number, since it is larger than the sum of its proper divisors (1).

389581117 is an equidigital number, since it uses as much as digits as its factorization.

389581117 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 60480, while the sum is 43.

The square root of 389581117 is about 19737.8093262652. The cubic root of 389581117 is about 730.3526893992.

The spelling of 389581117 in words is "three hundred eighty-nine million, five hundred eighty-one thousand, one hundred seventeen".