129697800 has 192 divisors, whose sum is σ = 438067200. Its totient is φ = 31622400.

The previous prime is 129697793. The next prime is 129697807. The reversal of 129697800 is 8796921.

It is an interprime number because it is at equal distance from previous prime (129697793) and next prime (129697807).

It is not an unprimeable number, because it can be changed into a prime (129697807) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 353217 + ... + 353583.

It is an arithmetic number, because the mean of its divisors is an integer number (2281600).

Almost surely, 2^129697800 is an apocalyptic number.

129697800 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 129697800, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (219033600).

129697800 is an abundant number, since it is smaller than the sum of its proper divisors (308369400).

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

129697800 is a wasteful number, since it uses less digits than its factorization.

129697800 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 436 (or 427 counting only the distinct ones).

The product of its (nonzero) digits is 54432, while the sum is 42.

The square root of 129697800 is about 11388.4941937027. The cubic root of 129697800 is about 506.1868630300.

The spelling of 129697800 in words is "one hundred twenty-nine million, six hundred ninety-seven thousand, eight hundred".