129428863 has 2 divisors, whose sum is σ = 129428864. Its totient is φ = 129428862.

The previous prime is 129428861. The next prime is 129428899. The reversal of 129428863 is 368824921.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 129428863 - 2¹ = 129428861 is a prime.

Together with 129428861, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (129428861) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64714431 + 64714432.

It is an arithmetic number, because the mean of its divisors is an integer number (64714432).

Almost surely, 2^129428863 is an apocalyptic number.

129428863 is a deficient number, since it is larger than the sum of its proper divisors (1).

129428863 is an equidigital number, since it uses as much as digits as its factorization.

129428863 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 165888, while the sum is 43.

The square root of 129428863 is about 11376.6806670487. The cubic root of 129428863 is about 505.8367502342.

The spelling of 129428863 in words is "one hundred twenty-nine million, four hundred twenty-eight thousand, eight hundred sixty-three".