129563279 has 2 divisors, whose sum is σ = 129563280. Its totient is φ = 129563278.

The previous prime is 129563267. The next prime is 129563281. The reversal of 129563279 is 972365921.

It is a strong prime.

It is an emirp because it is prime and its reverse (972365921) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-129563279 is a prime.

Together with 129563281, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (129563219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64781639 + 64781640.

It is an arithmetic number, because the mean of its divisors is an integer number (64781640).

Almost surely, 2^129563279 is an apocalyptic number.

129563279 is a deficient number, since it is larger than the sum of its proper divisors (1).

129563279 is an equidigital number, since it uses as much as digits as its factorization.

129563279 is an evil number, because the sum of its binary digits is even.

The product of its digits is 204120, while the sum is 44.

The square root of 129563279 is about 11382.5866568193. The cubic root of 129563279 is about 506.0117988469.

The spelling of 129563279 in words is "one hundred twenty-nine million, five hundred sixty-three thousand, two hundred seventy-nine".