129188966 has 8 divisors (see below), whose sum is σ = 200034624. Its totient is φ = 62510760.

The previous prime is 129188957. The next prime is 129188971. The reversal of 129188966 is 669881921.

It is a happy number.

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

It is a super-2 number, since 2×129188966² = 33379577872298312, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1041785 + ... + 1041908.

It is an arithmetic number, because the mean of its divisors is an integer number (25004328).

Almost surely, 2^129188966 is an apocalyptic number.

129188966 is a deficient number, since it is larger than the sum of its proper divisors (70845658).

129188966 is a wasteful number, since it uses less digits than its factorization.

129188966 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2083726.

The product of its digits is 373248, while the sum is 50.

The square root of 129188966 is about 11366.1324116869. The cubic root of 129188966 is about 505.5240333568.

The spelling of 129188966 in words is "one hundred twenty-nine million, one hundred eighty-eight thousand, nine hundred sixty-six".