389199897 has 10 divisors (see below), whose sum is σ = 581397498. Its totient is φ = 259466544.

The previous prime is 389199883. The next prime is 389199907. The reversal of 389199897 is 798991983.

It can be written as a sum of positive squares in only one way, i.e., 346741641 + 42458256 = 18621^2 + 6516^2 .

It is not a de Polignac number, because 389199897 - 2¹¹ = 389197849 is a prime.

It is not an unprimeable number, because it can be changed into a prime (389199397) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 2402388 + ... + 2402549.

Almost surely, 2^389199897 is an apocalyptic number.

It is an amenable number.

389199897 is a deficient number, since it is larger than the sum of its proper divisors (192197601).

389199897 is an equidigital number, since it uses as much as digits as its factorization.

389199897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4804949 (or 4804940 counting only the distinct ones).

The product of its digits is 8817984, while the sum is 63.

The square root of 389199897 is about 19728.1498625695. The cubic root of 389199897 is about 730.1143856536.

The spelling of 389199897 in words is "three hundred eighty-nine million, one hundred ninety-nine thousand, eight hundred ninety-seven".