389119257 has 6 divisors (see below), whose sum is σ = 562061162. Its totient is φ = 259412832.

The previous prime is 389119249. The next prime is 389119261. The reversal of 389119257 is 752911983.

389119257 is a `hidden beast` number, since 389 + 1 + 19 + 257 = 666.

It can be written as a sum of positive squares in only one way, i.e., 307686681 + 81432576 = 17541^2 + 9024^2 .

It is not a de Polignac number, because 389119257 - 2³ = 389119249 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (389119277) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 21617728 + ... + 21617745.

Almost surely, 2^389119257 is an apocalyptic number.

It is an amenable number.

389119257 is a deficient number, since it is larger than the sum of its proper divisors (172941905).

389119257 is a wasteful number, since it uses less digits than its factorization.

389119257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43235479 (or 43235476 counting only the distinct ones).

The product of its digits is 136080, while the sum is 45.

The square root of 389119257 is about 19726.1059765986. The cubic root of 389119257 is about 730.0639569910.

It can be divided in two parts, 389119 and 257, that added together give a square (389376 = 624²).

The spelling of 389119257 in words is "three hundred eighty-nine million, one hundred nineteen thousand, two hundred fifty-seven".