129705892 has 12 divisors (see below), whose sum is σ = 227086720. Its totient is φ = 64823976.

The previous prime is 129705887. The next prime is 129705899. The reversal of 129705892 is 298507921.

It is a hoax number, since the sum of its digits (43) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (129705899) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5209 + ... + 16927.

Almost surely, 2^129705892 is an apocalyptic number.

It is an amenable number.

129705892 is a deficient number, since it is larger than the sum of its proper divisors (97380828).

129705892 is a wasteful number, since it uses less digits than its factorization.

129705892 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14490 (or 14488 counting only the distinct ones).

The product of its (nonzero) digits is 90720, while the sum is 43.

The square root of 129705892 is about 11388.8494590103. The cubic root of 129705892 is about 506.1973900112.

The spelling of 129705892 in words is "one hundred twenty-nine million, seven hundred five thousand, eight hundred ninety-two".