129671279 has 2 divisors, whose sum is σ = 129671280. Its totient is φ = 129671278.

The previous prime is 129671239. The next prime is 129671303. The reversal of 129671279 is 972176921.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 129671279 - 2¹² = 129667183 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (129671239) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64835639 + 64835640.

It is an arithmetic number, because the mean of its divisors is an integer number (64835640).

Almost surely, 2^129671279 is an apocalyptic number.

129671279 is a deficient number, since it is larger than the sum of its proper divisors (1).

129671279 is an equidigital number, since it uses as much as digits as its factorization.

129671279 is an evil number, because the sum of its binary digits is even.

The product of its digits is 95256, while the sum is 44.

The square root of 129671279 is about 11387.3297572346. The cubic root of 129671279 is about 506.1523584691.

The spelling of 129671279 in words is "one hundred twenty-nine million, six hundred seventy-one thousand, two hundred seventy-nine".