189745793 has 2 divisors, whose sum is σ = 189745794. Its totient is φ = 189745792.

The previous prime is 189745769. The next prime is 189745847. The reversal of 189745793 is 397547981.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 182034064 + 7711729 = 13492^2 + 2777^2 .

It is a cyclic number.

It is not a de Polignac number, because 189745793 - 2⁶ = 189745729 is a prime.

It is a super-2 number, since 2×189745793² = 72006931922397698, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (189745763) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 94872896 + 94872897.

It is an arithmetic number, because the mean of its divisors is an integer number (94872897).

Almost surely, 2^189745793 is an apocalyptic number.

It is an amenable number.

189745793 is a deficient number, since it is larger than the sum of its proper divisors (1).

189745793 is an equidigital number, since it uses as much as digits as its factorization.

189745793 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1905120, while the sum is 53.

The square root of 189745793 is about 13774.8246086838. The cubic root of 189745793 is about 574.6332057681.

The spelling of 189745793 in words is "one hundred eighty-nine million, seven hundred forty-five thousand, seven hundred ninety-three".