189468637 has 2 divisors, whose sum is σ = 189468638. Its totient is φ = 189468636.

The previous prime is 189468611. The next prime is 189468659. The reversal of 189468637 is 736864981.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 183087961 + 6380676 = 13531^2 + 2526^2 .

It is an emirp because it is prime and its reverse (736864981) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 189468637 - 2⁷ = 189468509 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (189468607) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 94734318 + 94734319.

It is an arithmetic number, because the mean of its divisors is an integer number (94734319).

Almost surely, 2^189468637 is an apocalyptic number.

It is an amenable number.

189468637 is a deficient number, since it is larger than the sum of its proper divisors (1).

189468637 is an equidigital number, since it uses as much as digits as its factorization.

189468637 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1741824, while the sum is 52.

The square root of 189468637 is about 13764.7606953408. The cubic root of 189468637 is about 574.3532862596.

The spelling of 189468637 in words is "one hundred eighty-nine million, four hundred sixty-eight thousand, six hundred thirty-seven".