389231237 has 2 divisors, whose sum is σ = 389231238. Its totient is φ = 389231236.

The previous prime is 389231233. The next prime is 389231267. The reversal of 389231237 is 732132983.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 207763396 + 181467841 = 14414^2 + 13471^2 .

It is a cyclic number.

It is not a de Polignac number, because 389231237 - 2² = 389231233 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 389231237.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (389231233) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 194615618 + 194615619.

It is an arithmetic number, because the mean of its divisors is an integer number (194615619).

Almost surely, 2^389231237 is an apocalyptic number.

It is an amenable number.

389231237 is a deficient number, since it is larger than the sum of its proper divisors (1).

389231237 is an equidigital number, since it uses as much as digits as its factorization.

389231237 is an evil number, because the sum of its binary digits is even.

The product of its digits is 54432, while the sum is 38.

The square root of 389231237 is about 19728.9441430605. The cubic root of 389231237 is about 730.1339824134.

The spelling of 389231237 in words is "three hundred eighty-nine million, two hundred thirty-one thousand, two hundred thirty-seven".