189676989 has 12 divisors (see below), whose sum is σ = 275794272. Its totient is φ = 125613000.

The previous prime is 189676987. The next prime is 189677009. The reversal of 189676989 is 989676981.

It is not a de Polignac number, because 189676989 - 2¹ = 189676987 is a prime.

It is a super-2 number, since 2×189676989² = 71954720312212242, which contains 22 as substring.

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

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (189676987) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 68427 + ... + 71144.

It is an arithmetic number, because the mean of its divisors is an integer number (22982856).

Almost surely, 2^189676989 is an apocalyptic number.

It is an amenable number.

189676989 is a deficient number, since it is larger than the sum of its proper divisors (86117283).

189676989 is a wasteful number, since it uses less digits than its factorization.

189676989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139728 (or 139725 counting only the distinct ones).

The product of its digits is 11757312, while the sum is 63.

The square root of 189676989 is about 13772.3269275747. The cubic root of 189676989 is about 574.5637411750.

The spelling of 189676989 in words is "one hundred eighty-nine million, six hundred seventy-six thousand, nine hundred eighty-nine".