129213830 has 16 divisors (see below), whose sum is σ = 232801344. Its totient is φ = 51637440.

The previous prime is 129213811. The next prime is 129213853. The reversal of 129213830 is 38312921.

It is a junction number, because it is equal to n+sod(n) for n = 129213793 and 129213802.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6515 + ... + 17345.

It is an arithmetic number, because the mean of its divisors is an integer number (14550084).

Almost surely, 2^129213830 is an apocalyptic number.

129213830 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

129213830 is a deficient number, since it is larger than the sum of its proper divisors (103587514).

129213830 is a wasteful number, since it uses less digits than its factorization.

129213830 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12031.

The product of its (nonzero) digits is 2592, while the sum is 29.

The square root of 129213830 is about 11367.2261348141. The cubic root of 129213830 is about 505.5564627086.

Subtracting from 129213830 its reverse (38312921), we obtain a palindrome (90900909).

The spelling of 129213830 in words is "one hundred twenty-nine million, two hundred thirteen thousand, eight hundred thirty".