189555129 has 12 divisors (see below), whose sum is σ = 275032576. Its totient is φ = 125802072.

The previous prime is 189555109. The next prime is 189555131. The reversal of 189555129 is 921555981.

189555129 is a `hidden beast` number, since 1 + 8 + 95 + 551 + 2 + 9 = 666.

189555129 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 189555129 - 2⁵ = 189555097 is a prime.

It is a super-2 number, since 2×189555129² = 71862293860413282, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (189555109) by changing a digit.

It is an upside-down number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 45217 + ... + 49230.

Almost surely, 2^189555129 is an apocalyptic number.

It is an amenable number.

189555129 is a deficient number, since it is larger than the sum of its proper divisors (85477447).

189555129 is a wasteful number, since it uses less digits than its factorization.

189555129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94676 (or 94673 counting only the distinct ones).

The product of its digits is 162000, while the sum is 45.

The square root of 189555129 is about 13767.9021277753. The cubic root of 189555129 is about 574.4406699519.

The spelling of 189555129 in words is "one hundred eighty-nine million, five hundred fifty-five thousand, one hundred twenty-nine".