189795589 has 2 divisors, whose sum is σ = 189795590. Its totient is φ = 189795588.

The previous prime is 189795587. The next prime is 189795631. The reversal of 189795589 is 985597981.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 157703364 + 32092225 = 12558^2 + 5665^2 .

It is a cyclic number.

It is not a de Polignac number, because 189795589 - 2¹ = 189795587 is a prime.

Together with 189795587, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (189795587) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 94897794 + 94897795.

It is an arithmetic number, because the mean of its divisors is an integer number (94897795).

Almost surely, 2^189795589 is an apocalyptic number.

It is an amenable number.

189795589 is a deficient number, since it is larger than the sum of its proper divisors (1).

189795589 is an equidigital number, since it uses as much as digits as its factorization.

189795589 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8164800, while the sum is 61.

The square root of 189795589 is about 13776.6319904395. The cubic root of 189795589 is about 574.6834693900.

The spelling of 189795589 in words is "one hundred eighty-nine million, seven hundred ninety-five thousand, five hundred eighty-nine".