189257713 has 2 divisors, whose sum is σ = 189257714. Its totient is φ = 189257712.

The previous prime is 189257623. The next prime is 189257791. The reversal of 189257713 is 317752981.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 188018944 + 1238769 = 13712^2 + 1113^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-189257713 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 189257713.

It is not a weakly prime, because it can be changed into another prime (199257713) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 94628856 + 94628857.

It is an arithmetic number, because the mean of its divisors is an integer number (94628857).

Almost surely, 2^189257713 is an apocalyptic number.

It is an amenable number.

189257713 is a deficient number, since it is larger than the sum of its proper divisors (1).

189257713 is an equidigital number, since it uses as much as digits as its factorization.

189257713 is an evil number, because the sum of its binary digits is even.

The product of its digits is 105840, while the sum is 43.

The square root of 189257713 is about 13757.0968230946. The cubic root of 189257713 is about 574.1400761708.

The spelling of 189257713 in words is "one hundred eighty-nine million, two hundred fifty-seven thousand, seven hundred thirteen".