129319213 has 2 divisors, whose sum is σ = 129319214. Its totient is φ = 129319212.

The previous prime is 129319193. The next prime is 129319243. The reversal of 129319213 is 312913921.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 88397604 + 40921609 = 9402^2 + 6397^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-129319213 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (129319243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64659606 + 64659607.

It is an arithmetic number, because the mean of its divisors is an integer number (64659607).

Almost surely, 2^129319213 is an apocalyptic number.

It is an amenable number.

129319213 is a deficient number, since it is larger than the sum of its proper divisors (1).

129319213 is an equidigital number, since it uses as much as digits as its factorization.

129319213 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2916, while the sum is 31.

The square root of 129319213 is about 11371.8605777595. The cubic root of 129319213 is about 505.6938643566.

The spelling of 129319213 in words is "one hundred twenty-nine million, three hundred nineteen thousand, two hundred thirteen".