129376692 has 18 divisors (see below), whose sum is σ = 327035618. Its totient is φ = 43125552.

The previous prime is 129376673. The next prime is 129376693. The reversal of 129376692 is 296673921.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 129140496 + 236196 = 11364^2 + 486^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129376693) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1796863 + ... + 1796934.

Almost surely, 2^129376692 is an apocalyptic number.

129376692 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

129376692 is an abundant number, since it is smaller than the sum of its proper divisors (197658926).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

129376692 is a wasteful number, since it uses less digits than its factorization.

129376692 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3593807 (or 3593802 counting only the distinct ones).

The product of its digits is 244944, while the sum is 45.

The square root of 129376692 is about 11374.3875439515. The cubic root of 129376692 is about 505.7687758142.

The spelling of 129376692 in words is "one hundred twenty-nine million, three hundred seventy-six thousand, six hundred ninety-two".