129666933 has 32 divisors (see below), whose sum is σ = 210355200. Its totient is φ = 78289200.

The previous prime is 129666923. The next prime is 129666941. The reversal of 129666933 is 339666921.

It is a happy number.

It is not a de Polignac number, because 129666933 - 2⁹ = 129666421 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129666913) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 97648 + ... + 98966.

It is an arithmetic number, because the mean of its divisors is an integer number (6573600).

Almost surely, 2^129666933 is an apocalyptic number.

It is an amenable number.

129666933 is a deficient number, since it is larger than the sum of its proper divisors (80688267).

129666933 is a wasteful number, since it uses less digits than its factorization.

129666933 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1670 (or 1664 counting only the distinct ones).

The product of its digits is 314928, while the sum is 45.

The square root of 129666933 is about 11387.1389295117. The cubic root of 129666933 is about 506.1467037532.

The spelling of 129666933 in words is "one hundred twenty-nine million, six hundred sixty-six thousand, nine hundred thirty-three".