189898569 has 36 divisors (see below), whose sum is σ = 323894064. Its totient is φ = 106877232.

The previous prime is 189898561. The next prime is 189898589. The reversal of 189898569 is 965898981.

It is not a de Polignac number, because 189898569 - 2³ = 189898561 is a prime.

It is a super-2 number, since 2×189898569² = 72122933016495522, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (63).

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

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (189898561) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 26334 + ... + 32760.

Almost surely, 2^189898569 is an apocalyptic number.

It is an amenable number.

189898569 is a deficient number, since it is larger than the sum of its proper divisors (133995495).

189898569 is a wasteful number, since it uses less digits than its factorization.

189898569 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6514 (or 6504 counting only the distinct ones).

The product of its digits is 11197440, while the sum is 63.

The square root of 189898569 is about 13780.3689718382. The cubic root of 189898569 is about 574.7873885655.

The spelling of 189898569 in words is "one hundred eighty-nine million, eight hundred ninety-eight thousand, five hundred sixty-nine".