129713237 has 4 divisors (see below), whose sum is σ = 131540256. Its totient is φ = 127886220.

The previous prime is 129713219. The next prime is 129713239. The reversal of 129713237 is 732317921.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 129713237 - 2⁶ = 129713173 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 129713197 and 129713206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129713239) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 913403 + ... + 913544.

It is an arithmetic number, because the mean of its divisors is an integer number (32885064).

Almost surely, 2^129713237 is an apocalyptic number.

It is an amenable number.

129713237 is a deficient number, since it is larger than the sum of its proper divisors (1827019).

129713237 is an equidigital number, since it uses as much as digits as its factorization.

129713237 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1827018.

The product of its digits is 15876, while the sum is 35.

The square root of 129713237 is about 11389.1719189764. The cubic root of 129713237 is about 506.2069448320.

The spelling of 129713237 in words is "one hundred twenty-nine million, seven hundred thirteen thousand, two hundred thirty-seven".