232157689 has 2 divisors, whose sum is σ = 232157690. Its totient is φ = 232157688.

The previous prime is 232157663. The next prime is 232157741. The reversal of 232157689 is 986751232.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 206066025 + 26091664 = 14355^2 + 5108^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-232157689 is a prime.

It is not a weakly prime, because it can be changed into another prime (232157089) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 116078844 + 116078845.

It is an arithmetic number, because the mean of its divisors is an integer number (116078845).

Almost surely, 2^232157689 is an apocalyptic number.

It is an amenable number.

232157689 is a deficient number, since it is larger than the sum of its proper divisors (1).

232157689 is an equidigital number, since it uses as much as digits as its factorization.

232157689 is an evil number, because the sum of its binary digits is even.

The product of its digits is 181440, while the sum is 43.

The square root of 232157689 is about 15236.7217274583. The cubic root of 232157689 is about 614.6025492882.

The spelling of 232157689 in words is "two hundred thirty-two million, one hundred fifty-seven thousand, six hundred eighty-nine".