190889 has 2 divisors, whose sum is σ = 190890. Its totient is φ = 190888.

The previous prime is 190871. The next prime is 190891. The reversal of 190889 is 988091.

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., 105625 + 85264 = 325^2 + 292^2 .

It is a cyclic number.

It is not a de Polignac number, because 190889 - 2⁸ = 190633 is a prime.

It is a super-2 number, since 2×190889² = 72877220642, which contains 22 as substring.

Together with 190891, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (190829) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 95444 + 95445.

It is an arithmetic number, because the mean of its divisors is an integer number (95445).

2¹⁹⁰⁸⁸⁹ is an apocalyptic number.

It is an amenable number.

190889 is a deficient number, since it is larger than the sum of its proper divisors (1).

190889 is an equidigital number, since it uses as much as digits as its factorization.

190889 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5184, while the sum is 35.

The square root of 190889 is about 436.9084572310. The cubic root of 190889 is about 57.5784939325.

The spelling of 190889 in words is "one hundred ninety thousand, eight hundred eighty-nine".