129455233 has 2 divisors, whose sum is σ = 129455234. Its totient is φ = 129455232.

The previous prime is 129455197. The next prime is 129455243. The reversal of 129455233 is 332554921.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 104284944 + 25170289 = 10212^2 + 5017^2 .

It is an emirp because it is prime and its reverse (332554921) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 129455233 - 2²⁵ = 95900801 is a prime.

It is not a weakly prime, because it can be changed into another prime (129455243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64727616 + 64727617.

It is an arithmetic number, because the mean of its divisors is an integer number (64727617).

Almost surely, 2^129455233 is an apocalyptic number.

It is an amenable number.

129455233 is a deficient number, since it is larger than the sum of its proper divisors (1).

129455233 is an equidigital number, since it uses as much as digits as its factorization.

129455233 is an evil number, because the sum of its binary digits is even.

The product of its digits is 32400, while the sum is 34.

The square root of 129455233 is about 11377.8395576665. The cubic root of 129455233 is about 505.8711011742.

The spelling of 129455233 in words is "one hundred twenty-nine million, four hundred fifty-five thousand, two hundred thirty-three".