129438613 has 2 divisors, whose sum is σ = 129438614. Its totient is φ = 129438612.

The previous prime is 129438601. The next prime is 129438619. The reversal of 129438613 is 316834921.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 80676324 + 48762289 = 8982^2 + 6983^2 .

It is a cyclic number.

It is not a de Polignac number, because 129438613 - 2⁵ = 129438581 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (129438619) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64719306 + 64719307.

It is an arithmetic number, because the mean of its divisors is an integer number (64719307).

Almost surely, 2^129438613 is an apocalyptic number.

It is an amenable number.

129438613 is a deficient number, since it is larger than the sum of its proper divisors (1).

129438613 is an equidigital number, since it uses as much as digits as its factorization.

129438613 is an evil number, because the sum of its binary digits is even.

The product of its digits is 31104, while the sum is 37.

The square root of 129438613 is about 11377.1091670951. The cubic root of 129438613 is about 505.8494516373.

The spelling of 129438613 in words is "one hundred twenty-nine million, four hundred thirty-eight thousand, six hundred thirteen".