189258257 has 2 divisors, whose sum is σ = 189258258. Its totient is φ = 189258256.

The previous prime is 189258241. The next prime is 189258281. The reversal of 189258257 is 752852981.

189258257 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 125641681 + 63616576 = 11209^2 + 7976^2 .

It is an emirp because it is prime and its reverse (752852981) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 189258257 - 2⁴ = 189258241 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (189258227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 94629128 + 94629129.

It is an arithmetic number, because the mean of its divisors is an integer number (94629129).

Almost surely, 2^189258257 is an apocalyptic number.

It is an amenable number.

189258257 is a deficient number, since it is larger than the sum of its proper divisors (1).

189258257 is an equidigital number, since it uses as much as digits as its factorization.

189258257 is an evil number, because the sum of its binary digits is even.

The product of its digits is 403200, while the sum is 47.

The square root of 189258257 is about 13757.1165946938. The cubic root of 189258257 is about 574.1406262706.

The spelling of 189258257 in words is "one hundred eighty-nine million, two hundred fifty-eight thousand, two hundred fifty-seven".