189213659 has 2 divisors, whose sum is σ = 189213660. Its totient is φ = 189213658.

The previous prime is 189213637. The next prime is 189213667. The reversal of 189213659 is 956312981.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 189213659 - 2⁸ = 189213403 is a prime.

It is not a weakly prime, because it can be changed into another prime (189213359) 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, 94606829 + 94606830.

It is an arithmetic number, because the mean of its divisors is an integer number (94606830).

Almost surely, 2^189213659 is an apocalyptic number.

189213659 is a deficient number, since it is larger than the sum of its proper divisors (1).

189213659 is an equidigital number, since it uses as much as digits as its factorization.

189213659 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 116640, while the sum is 44.

The square root of 189213659 is about 13755.4955926713. The cubic root of 189213659 is about 574.0955246977.

It can be divided in two parts, 1892 and 13659, that added together give a palindrome (15551).

The spelling of 189213659 in words is "one hundred eighty-nine million, two hundred thirteen thousand, six hundred fifty-nine".