189523237 has 2 divisors, whose sum is σ = 189523238. Its totient is φ = 189523236.

The previous prime is 189523189. The next prime is 189523249. The reversal of 189523237 is 732325981.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 174266401 + 15256836 = 13201^2 + 3906^2 .

It is a cyclic number.

It is not a de Polignac number, because 189523237 - 2¹⁹ = 188998949 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 189523237.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (189523937) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 94761618 + 94761619.

It is an arithmetic number, because the mean of its divisors is an integer number (94761619).

Almost surely, 2^189523237 is an apocalyptic number.

It is an amenable number.

189523237 is a deficient number, since it is larger than the sum of its proper divisors (1).

189523237 is an equidigital number, since it uses as much as digits as its factorization.

189523237 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 90720, while the sum is 40.

The square root of 189523237 is about 13766.7438779110. The cubic root of 189523237 is about 574.4084522545.

The spelling of 189523237 in words is "one hundred eighty-nine million, five hundred twenty-three thousand, two hundred thirty-seven".