389888399 has 2 divisors, whose sum is σ = 389888400. Its totient is φ = 389888398.

The previous prime is 389888377. The next prime is 389888407. The reversal of 389888399 is 993888983.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 389888399 - 2⁸ = 389888143 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (389888309) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 194944199 + 194944200.

It is an arithmetic number, because the mean of its divisors is an integer number (194944200).

Almost surely, 2^389888399 is an apocalyptic number.

389888399 is a deficient number, since it is larger than the sum of its proper divisors (1).

389888399 is an equidigital number, since it uses as much as digits as its factorization.

389888399 is an evil number, because the sum of its binary digits is even.

The product of its digits is 26873856, while the sum is 65.

The square root of 389888399 is about 19745.5918878113. The cubic root of 389888399 is about 730.5446607639.

The spelling of 389888399 in words is "three hundred eighty-nine million, eight hundred eighty-eight thousand, three hundred ninety-nine".