389933897 has 2 divisors, whose sum is σ = 389933898. Its totient is φ = 389933896.

The previous prime is 389933893. The next prime is 389933909. The reversal of 389933897 is 798339983.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 273703936 + 116229961 = 16544^2 + 10781^2 .

It is a cyclic number.

It is not a de Polignac number, because 389933897 - 2² = 389933893 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (389933893) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 194966948 + 194966949.

It is an arithmetic number, because the mean of its divisors is an integer number (194966949).

Almost surely, 2^389933897 is an apocalyptic number.

It is an amenable number.

389933897 is a deficient number, since it is larger than the sum of its proper divisors (1).

389933897 is an equidigital number, since it uses as much as digits as its factorization.

389933897 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8817984, while the sum is 59.

The square root of 389933897 is about 19746.7439594481. The cubic root of 389933897 is about 730.5730766116.

The spelling of 389933897 in words is "three hundred eighty-nine million, nine hundred thirty-three thousand, eight hundred ninety-seven".