129666934 has 4 divisors (see below), whose sum is σ = 194500404. Its totient is φ = 64833466.

The previous prime is 129666923. The next prime is 129666941. The reversal of 129666934 is 439666921.

It is a semiprime because it is the product of two primes.

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, 32416732 + ... + 32416735.

It is an arithmetic number, because the mean of its divisors is an integer number (48625101).

Almost surely, 2^129666934 is an apocalyptic number.

129666934 is a deficient number, since it is larger than the sum of its proper divisors (64833470).

129666934 is an equidigital number, since it uses as much as digits as its factorization.

129666934 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64833469.

The product of its digits is 419904, while the sum is 46.

The square root of 129666934 is about 11387.1389734208. The cubic root of 129666934 is about 506.1467050543.

It can be divided in two parts, 12966 and 6934, that added together give a triangular number (19900 = T₁₉₉).

The spelling of 129666934 in words is "one hundred twenty-nine million, six hundred sixty-six thousand, nine hundred thirty-four".