389915671 has 2 divisors, whose sum is σ = 389915672. Its totient is φ = 389915670.

The previous prime is 389915633. The next prime is 389915677. The reversal of 389915671 is 176519983.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 389915671 - 2⁷ = 389915543 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (389915677) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 194957835 + 194957836.

It is an arithmetic number, because the mean of its divisors is an integer number (194957836).

Almost surely, 2^389915671 is an apocalyptic number.

389915671 is a deficient number, since it is larger than the sum of its proper divisors (1).

389915671 is an equidigital number, since it uses as much as digits as its factorization.

389915671 is an evil number, because the sum of its binary digits is even.

The product of its digits is 408240, while the sum is 49.

The square root of 389915671 is about 19746.2824602506. The cubic root of 389915671 is about 730.5616937999.

The spelling of 389915671 in words is "three hundred eighty-nine million, nine hundred fifteen thousand, six hundred seventy-one".