129162189 has 8 divisors (see below), whose sum is σ = 185463712. Its totient is φ = 79484400.

The previous prime is 129162167. The next prime is 129162191. The reversal of 129162189 is 981261921.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 129162189 - 2⁸ = 129161933 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39), and also a Moran number because the ratio is a prime number: 3311851 = 129162189 / (1 + 2 + 9 + 1 + 6 + 2 + 1 + 8 + 9).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129162109) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1655887 + ... + 1655964.

It is an arithmetic number, because the mean of its divisors is an integer number (23182964).

Almost surely, 2^129162189 is an apocalyptic number.

It is an amenable number.

129162189 is a deficient number, since it is larger than the sum of its proper divisors (56301523).

129162189 is a wasteful number, since it uses less digits than its factorization.

129162189 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3311867.

The product of its digits is 15552, while the sum is 39.

The square root of 129162189 is about 11364.9544213780. The cubic root of 129162189 is about 505.4891042841.

The spelling of 129162189 in words is "one hundred twenty-nine million, one hundred sixty-two thousand, one hundred eighty-nine".