129908851 has 2 divisors, whose sum is σ = 129908852. Its totient is φ = 129908850.

The previous prime is 129908843. The next prime is 129908897. The reversal of 129908851 is 158809921.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 129908851 - 2³ = 129908843 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 129908798 and 129908807.

It is not a weakly prime, because it can be changed into another prime (129908651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64954425 + 64954426.

It is an arithmetic number, because the mean of its divisors is an integer number (64954426).

Almost surely, 2^129908851 is an apocalyptic number.

129908851 is a deficient number, since it is larger than the sum of its proper divisors (1).

129908851 is an equidigital number, since it uses as much as digits as its factorization.

129908851 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 51840, while the sum is 43.

The square root of 129908851 is about 11397.7564020293. The cubic root of 129908851 is about 506.4612787586.

The spelling of 129908851 in words is "one hundred twenty-nine million, nine hundred eight thousand, eight hundred fifty-one".