129679213 has 12 divisors (see below), whose sum is σ = 142515540. Its totient is φ = 117834752.

The previous prime is 129679159. The next prime is 129679219. The reversal of 129679213 is 312976921.

It can be written as a sum of positive squares in 6 ways, for example, as 9162729 + 120516484 = 3027^2 + 10978^2 .

It is not a de Polignac number, because 129679213 - 2¹⁷ = 129548141 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129679219) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 645 + ... + 16117.

It is an arithmetic number, because the mean of its divisors is an integer number (11876295).

Almost surely, 2^129679213 is an apocalyptic number.

It is an amenable number.

129679213 is a deficient number, since it is larger than the sum of its proper divisors (12836327).

129679213 is a wasteful number, since it uses less digits than its factorization.

129679213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15536 (or 15519 counting only the distinct ones).

The product of its digits is 40824, while the sum is 40.

The square root of 129679213 is about 11387.6781215487. The cubic root of 129679213 is about 506.1626813176.

The spelling of 129679213 in words is "one hundred twenty-nine million, six hundred seventy-nine thousand, two hundred thirteen".