189456129 has 12 divisors (see below), whose sum is σ = 285557376. Its totient is φ = 120812472.

The previous prime is 189456073. The next prime is 189456167. The reversal of 189456129 is 921654981.

189456129 is a `hidden beast` number, since 1 + 89 + 4 + 561 + 2 + 9 = 666.

189456129 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a de Polignac number, because none of the positive numbers 2^k-189456129 is a prime.

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

It is not an unprimeable number, because it can be changed into a prime (189456199) 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, 457417 + ... + 457830.

It is an arithmetic number, because the mean of its divisors is an integer number (23796448).

Almost surely, 2^189456129 is an apocalyptic number.

It is an amenable number.

189456129 is a deficient number, since it is larger than the sum of its proper divisors (96101247).

189456129 is a wasteful number, since it uses less digits than its factorization.

189456129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 915276 (or 915273 counting only the distinct ones).

The product of its digits is 155520, while the sum is 45.

The square root of 189456129 is about 13764.3063392239. The cubic root of 189456129 is about 574.3406471071.

The spelling of 189456129 in words is "one hundred eighty-nine million, four hundred fifty-six thousand, one hundred twenty-nine".