390895117 has 2 divisors, whose sum is σ = 390895118. Its totient is φ = 390895116.

The previous prime is 390895091. The next prime is 390895123. The reversal of 390895117 is 711598093.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 332004841 + 58890276 = 18221^2 + 7674^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-390895117 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (390895157) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 195447558 + 195447559.

It is an arithmetic number, because the mean of its divisors is an integer number (195447559).

Almost surely, 2^390895117 is an apocalyptic number.

It is an amenable number.

390895117 is a deficient number, since it is larger than the sum of its proper divisors (1).

390895117 is an equidigital number, since it uses as much as digits as its factorization.

390895117 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 68040, while the sum is 43.

The square root of 390895117 is about 19771.0676747615. The cubic root of 390895117 is about 731.1728921349.

The spelling of 390895117 in words is "three hundred ninety million, eight hundred ninety-five thousand, one hundred seventeen".