129694812 has 48 divisors (see below), whose sum is σ = 326659872. Its totient is φ = 39813120.

The previous prime is 129694811. The next prime is 129694871. The reversal of 129694812 is 218496921.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129694811) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 99348 + ... + 100644.

It is an arithmetic number, because the mean of its divisors is an integer number (6805414).

Almost surely, 2^129694812 is an apocalyptic number.

129694812 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

129694812 is an abundant number, since it is smaller than the sum of its proper divisors (196965060).

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

129694812 is a wasteful number, since it uses less digits than its factorization.

129694812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1958 (or 1956 counting only the distinct ones).

The product of its digits is 62208, while the sum is 42.

The square root of 129694812 is about 11388.3630079129. The cubic root of 129694812 is about 506.1829757938.

The spelling of 129694812 in words is "one hundred twenty-nine million, six hundred ninety-four thousand, eight hundred twelve".