129438619 has 2 divisors, whose sum is σ = 129438620. Its totient is φ = 129438618.

The previous prime is 129438613. The next prime is 129438623. The reversal of 129438619 is 916834921.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 129438619 - 2¹⁵ = 129405851 is a prime.

It is a super-2 number, since 2×129438619² = 33508712177254322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (129438613) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64719309 + 64719310.

It is an arithmetic number, because the mean of its divisors is an integer number (64719310).

Almost surely, 2^129438619 is an apocalyptic number.

129438619 is a deficient number, since it is larger than the sum of its proper divisors (1).

129438619 is an equidigital number, since it uses as much as digits as its factorization.

129438619 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 93312, while the sum is 43.

The square root of 129438619 is about 11377.1094307825. The cubic root of 129438619 is about 505.8494594534.

The spelling of 129438619 in words is "one hundred twenty-nine million, four hundred thirty-eight thousand, six hundred nineteen".