189896569 has 2 divisors, whose sum is σ = 189896570. Its totient is φ = 189896568.

The previous prime is 189896561. The next prime is 189896573. The reversal of 189896569 is 965698981.

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., 184606569 + 5290000 = 13587^2 + 2300^2 .

It is a cyclic number.

It is not a de Polignac number, because 189896569 - 2³ = 189896561 is a prime.

It is a super-2 number, since 2×189896569² = 72121413835943522, which contains 22 as substring.

It is an alternating number because its digits alternate between odd and even.

It is not a weakly prime, because it can be changed into another prime (189896561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 94948284 + 94948285.

It is an arithmetic number, because the mean of its divisors is an integer number (94948285).

Almost surely, 2^189896569 is an apocalyptic number.

It is an amenable number.

189896569 is a deficient number, since it is larger than the sum of its proper divisors (1).

189896569 is an equidigital number, since it uses as much as digits as its factorization.

189896569 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8398080, while the sum is 61.

The square root of 189896569 is about 13780.2964046496. The cubic root of 189896569 is about 574.7853706833.

The spelling of 189896569 in words is "one hundred eighty-nine million, eight hundred ninety-six thousand, five hundred sixty-nine".