129837213 has 24 divisors (see below), whose sum is σ = 205298496. Its totient is φ = 78417600.

The previous prime is 129837209. The next prime is 129837233. The reversal of 129837213 is 312738921.

It is not a de Polignac number, because 129837213 - 2² = 129837209 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129837233) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 28681 + ... + 32897.

It is an arithmetic number, because the mean of its divisors is an integer number (8554104).

Almost surely, 2^129837213 is an apocalyptic number.

It is an amenable number.

129837213 is a deficient number, since it is larger than the sum of its proper divisors (75461283).

129837213 is a wasteful number, since it uses less digits than its factorization.

129837213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4545 (or 4542 counting only the distinct ones).

The product of its digits is 18144, while the sum is 36.

The square root of 129837213 is about 11394.6133326234. The cubic root of 129837213 is about 506.3681659233.

The spelling of 129837213 in words is "one hundred twenty-nine million, eight hundred thirty-seven thousand, two hundred thirteen".