129707137 has 4 divisors (see below), whose sum is σ = 148236736. Its totient is φ = 111177540.

The previous prime is 129707113. The next prime is 129707141. The reversal of 129707137 is 731707921.

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 129707137 - 2⁷ = 129707009 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 129707096 and 129707105.

It is not an unprimeable number, because it can be changed into a prime (129702137) 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, 9264789 + ... + 9264802.

It is an arithmetic number, because the mean of its divisors is an integer number (37059184).

Almost surely, 2^129707137 is an apocalyptic number.

It is an amenable number.

129707137 is a deficient number, since it is larger than the sum of its proper divisors (18529599).

129707137 is an equidigital number, since it uses as much as digits as its factorization.

129707137 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18529598.

The product of its (nonzero) digits is 18522, while the sum is 37.

The square root of 129707137 is about 11388.9041176050. The cubic root of 129707137 is about 506.1990096080.

The spelling of 129707137 in words is "one hundred twenty-nine million, seven hundred seven thousand, one hundred thirty-seven".