129618013 has 8 divisors (see below), whose sum is σ = 156848832. Its totient is φ = 104565696.

The previous prime is 129618011. The next prime is 129618031. The reversal of 129618013 is 310816921.

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

It is a cyclic number.

It is not a de Polignac number, because 129618013 - 2¹ = 129618011 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129618011) 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, 544495 + ... + 544732.

It is an arithmetic number, because the mean of its divisors is an integer number (19606104).

Almost surely, 2^129618013 is an apocalyptic number.

It is an amenable number.

129618013 is a deficient number, since it is larger than the sum of its proper divisors (27230819).

129618013 is a wasteful number, since it uses less digits than its factorization.

129618013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1089251.

The product of its (nonzero) digits is 2592, while the sum is 31.

The square root of 129618013 is about 11384.9906894999. The cubic root of 129618013 is about 506.0830437008.

The spelling of 129618013 in words is "one hundred twenty-nine million, six hundred eighteen thousand, thirteen".