129284893 has 2 divisors, whose sum is σ = 129284894. Its totient is φ = 129284892.

The previous prime is 129284833. The next prime is 129284923. The reversal of 129284893 is 398482921.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 119311929 + 9972964 = 10923^2 + 3158^2 .

It is an emirp because it is prime and its reverse (398482921) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 129284893 - 2¹⁷ = 129153821 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (129284833) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64642446 + 64642447.

It is an arithmetic number, because the mean of its divisors is an integer number (64642447).

Almost surely, 2^129284893 is an apocalyptic number.

It is an amenable number.

129284893 is a deficient number, since it is larger than the sum of its proper divisors (1).

129284893 is an equidigital number, since it uses as much as digits as its factorization.

129284893 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 248832, while the sum is 46.

The square root of 129284893 is about 11370.3514897298. The cubic root of 129284893 is about 505.6491250675.

The spelling of 129284893 in words is "one hundred twenty-nine million, two hundred eighty-four thousand, eight hundred ninety-three".