129833987 has 2 divisors, whose sum is σ = 129833988. Its totient is φ = 129833986.

The previous prime is 129833971. The next prime is 129834037. The reversal of 129833987 is 789338921.

It is a happy number.

It is an a-pointer prime, because the next prime (129834037) can be obtained adding 129833987 to its sum of digits (50).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 129833987 - 2⁴ = 129833971 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (129833927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64916993 + 64916994.

It is an arithmetic number, because the mean of its divisors is an integer number (64916994).

Almost surely, 2^129833987 is an apocalyptic number.

129833987 is a deficient number, since it is larger than the sum of its proper divisors (1).

129833987 is an equidigital number, since it uses as much as digits as its factorization.

129833987 is an evil number, because the sum of its binary digits is even.

The product of its digits is 653184, while the sum is 50.

The square root of 129833987 is about 11394.4717736278. The cubic root of 129833987 is about 506.3639720635.

The spelling of 129833987 in words is "one hundred twenty-nine million, eight hundred thirty-three thousand, nine hundred eighty-seven".