129700730 has 32 divisors (see below), whose sum is σ = 240033024. Its totient is φ = 50435136.

The previous prime is 129700729. The next prime is 129700733. The reversal of 129700730 is 37007921.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 129700693 and 129700702.

It is not an unprimeable number, because it can be changed into a prime (129700733) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 75764 + ... + 77456.

It is an arithmetic number, because the mean of its divisors is an integer number (7501032).

Almost surely, 2^129700730 is an apocalyptic number.

129700730 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

129700730 is a deficient number, since it is larger than the sum of its proper divisors (110332294).

129700730 is a wasteful number, since it uses less digits than its factorization.

129700730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1910.

The product of its (nonzero) digits is 2646, while the sum is 29.

The square root of 129700730 is about 11388.6228315806. The cubic root of 129700730 is about 506.1906747532.

The spelling of 129700730 in words is "one hundred twenty-nine million, seven hundred thousand, seven hundred thirty".