129466891 has 2 divisors, whose sum is σ = 129466892. Its totient is φ = 129466890.

The previous prime is 129466873. The next prime is 129466903. The reversal of 129466891 is 198664921.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 129466891 - 2⁷ = 129466763 is a prime.

It is not a weakly prime, because it can be changed into another prime (129466801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64733445 + 64733446.

It is an arithmetic number, because the mean of its divisors is an integer number (64733446).

Almost surely, 2^129466891 is an apocalyptic number.

129466891 is a deficient number, since it is larger than the sum of its proper divisors (1).

129466891 is an equidigital number, since it uses as much as digits as its factorization.

129466891 is an evil number, because the sum of its binary digits is even.

The product of its digits is 186624, while the sum is 46.

The square root of 129466891 is about 11378.3518578044. The cubic root of 129466891 is about 505.8862860072.

The spelling of 129466891 in words is "one hundred twenty-nine million, four hundred sixty-six thousand, eight hundred ninety-one".