129894859 has 2 divisors, whose sum is σ = 129894860. Its totient is φ = 129894858.

The previous prime is 129894851. The next prime is 129894883. The reversal of 129894859 is 958498921.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 129894859 - 2³ = 129894851 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (129894851) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64947429 + 64947430.

It is an arithmetic number, because the mean of its divisors is an integer number (64947430).

Almost surely, 2^129894859 is an apocalyptic number.

129894859 is a deficient number, since it is larger than the sum of its proper divisors (1).

129894859 is an equidigital number, since it uses as much as digits as its factorization.

129894859 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1866240, while the sum is 55.

The square root of 129894859 is about 11397.1425804892. The cubic root of 129894859 is about 506.4430950844.

The spelling of 129894859 in words is "one hundred twenty-nine million, eight hundred ninety-four thousand, eight hundred fifty-nine".