129159892 has 6 divisors (see below), whose sum is σ = 226029818. Its totient is φ = 64579944.

The previous prime is 129159883. The next prime is 129159907. The reversal of 129159892 is 298951921.

It can be written as a sum of positive squares in only one way, i.e., 122677776 + 6482116 = 11076^2 + 2546^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16144983 + ... + 16144990.

Almost surely, 2^129159892 is an apocalyptic number.

It is an amenable number.

129159892 is a deficient number, since it is larger than the sum of its proper divisors (96869926).

129159892 is a wasteful number, since it uses less digits than its factorization.

129159892 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32289977 (or 32289975 counting only the distinct ones).

The product of its digits is 116640, while the sum is 46.

The square root of 129159892 is about 11364.8533646502. The cubic root of 129159892 is about 505.4861077535.

The spelling of 129159892 in words is "one hundred twenty-nine million, one hundred fifty-nine thousand, eight hundred ninety-two".