189642433 has 2 divisors, whose sum is σ = 189642434. Its totient is φ = 189642432.

The previous prime is 189642421. The next prime is 189642443. The reversal of 189642433 is 334246981.

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., 185177664 + 4464769 = 13608^2 + 2113^2 .

It is an emirp because it is prime and its reverse (334246981) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 189642433 - 2²⁵ = 156088001 is a prime.

It is not a weakly prime, because it can be changed into another prime (189642403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 94821216 + 94821217.

It is an arithmetic number, because the mean of its divisors is an integer number (94821217).

Almost surely, 2^189642433 is an apocalyptic number.

It is an amenable number.

189642433 is a deficient number, since it is larger than the sum of its proper divisors (1).

189642433 is an equidigital number, since it uses as much as digits as its factorization.

189642433 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 124416, while the sum is 40.

The square root of 189642433 is about 13771.0723257123. The cubic root of 189642433 is about 574.5288470627.

The spelling of 189642433 in words is "one hundred eighty-nine million, six hundred forty-two thousand, four hundred thirty-three".