129937513 has 4 divisors (see below), whose sum is σ = 130886100. Its totient is φ = 128988928.

The previous prime is 129937499. The next prime is 129937531. The reversal of 129937513 is 315739921.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 58247424 + 71690089 = 7632^2 + 8467^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-129937513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (129937543) 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, 474088 + ... + 474361.

It is an arithmetic number, because the mean of its divisors is an integer number (32721525).

Almost surely, 2^129937513 is an apocalyptic number.

It is an amenable number.

129937513 is a deficient number, since it is larger than the sum of its proper divisors (948587).

129937513 is an equidigital number, since it uses as much as digits as its factorization.

129937513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 948586.

The product of its digits is 51030, while the sum is 40.

The square root of 129937513 is about 11399.0136854028. The cubic root of 129937513 is about 506.4985231434.

The spelling of 129937513 in words is "one hundred twenty-nine million, nine hundred thirty-seven thousand, five hundred thirteen".