129956613 has 8 divisors (see below), whose sum is σ = 173560608. Its totient is φ = 86495184.

The previous prime is 129956611. The next prime is 129956639. The reversal of 129956613 is 316659921.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 129956613 - 2¹ = 129956611 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129956611) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33495 + ... + 37172.

It is an arithmetic number, because the mean of its divisors is an integer number (21695076).

Almost surely, 2^129956613 is an apocalyptic number.

It is an amenable number.

129956613 is a deficient number, since it is larger than the sum of its proper divisors (43603995).

129956613 is an equidigital number, since it uses as much as digits as its factorization.

129956613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71283.

The product of its digits is 87480, while the sum is 42.

The square root of 129956613 is about 11399.8514464005. The cubic root of 129956613 is about 506.5233392970.

The spelling of 129956613 in words is "one hundred twenty-nine million, nine hundred fifty-six thousand, six hundred thirteen".