389232881 has 2 divisors, whose sum is σ = 389232882. Its totient is φ = 389232880.

The previous prime is 389232847. The next prime is 389232913. The reversal of 389232881 is 188232983.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 295530481 + 93702400 = 17191^2 + 9680^2 .

It is a cyclic number.

It is not a de Polignac number, because 389232881 - 2²⁶ = 322124017 is a prime.

It is a super-2 number, since 2×389232881² = 303004471303120322, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (389232281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 194616440 + 194616441.

It is an arithmetic number, because the mean of its divisors is an integer number (194616441).

Almost surely, 2^389232881 is an apocalyptic number.

It is an amenable number.

389232881 is a deficient number, since it is larger than the sum of its proper divisors (1).

389232881 is an equidigital number, since it uses as much as digits as its factorization.

389232881 is an evil number, because the sum of its binary digits is even.

The product of its digits is 165888, while the sum is 44.

The square root of 389232881 is about 19728.9858076892. The cubic root of 389232881 is about 730.1350103701.

The spelling of 389232881 in words is "three hundred eighty-nine million, two hundred thirty-two thousand, eight hundred eighty-one".