189643793 has 2 divisors, whose sum is σ = 189643794. Its totient is φ = 189643792.

The previous prime is 189643787. The next prime is 189643801. The reversal of 189643793 is 397346981.

189643793 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 169859089 + 19784704 = 13033^2 + 4448^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-189643793 is a prime.

It is not a weakly prime, because it can be changed into another prime (189643733) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 94821896 + 94821897.

It is an arithmetic number, because the mean of its divisors is an integer number (94821897).

Almost surely, 2^189643793 is an apocalyptic number.

It is an amenable number.

189643793 is a deficient number, since it is larger than the sum of its proper divisors (1).

189643793 is an equidigital number, since it uses as much as digits as its factorization.

189643793 is an evil number, because the sum of its binary digits is even.

The product of its digits is 979776, while the sum is 50.

The square root of 189643793 is about 13771.1217044945. The cubic root of 189643793 is about 574.5302204497.

The spelling of 189643793 in words is "one hundred eighty-nine million, six hundred forty-three thousand, seven hundred ninety-three".