129942859 has 2 divisors, whose sum is σ = 129942860. Its totient is φ = 129942858.

The previous prime is 129942763. The next prime is 129942877. The reversal of 129942859 is 958249921.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 129942859 - 2⁹ = 129942347 is a prime.

It is not a weakly prime, because it can be changed into another prime (129942959) 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, 64971429 + 64971430.

It is an arithmetic number, because the mean of its divisors is an integer number (64971430).

Almost surely, 2^129942859 is an apocalyptic number.

129942859 is a deficient number, since it is larger than the sum of its proper divisors (1).

129942859 is an equidigital number, since it uses as much as digits as its factorization.

129942859 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 466560, while the sum is 49.

The square root of 129942859 is about 11399.2481769633. The cubic root of 129942859 is about 506.5054693129.

The spelling of 129942859 in words is "one hundred twenty-nine million, nine hundred forty-two thousand, eight hundred fifty-nine".