129200047 has 2 divisors, whose sum is σ = 129200048. Its totient is φ = 129200046.

The previous prime is 129200011. The next prime is 129200059. The reversal of 129200047 is 740002921.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 129200047 - 2¹⁹ = 128675759 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 129199994 and 129200030.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (129200087) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64600023 + 64600024.

It is an arithmetic number, because the mean of its divisors is an integer number (64600024).

Almost surely, 2^129200047 is an apocalyptic number.

129200047 is a deficient number, since it is larger than the sum of its proper divisors (1).

129200047 is an equidigital number, since it uses as much as digits as its factorization.

129200047 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1008, while the sum is 25.

The square root of 129200047 is about 11366.6198581636. The cubic root of 129200047 is about 505.5384864789.

Adding to 129200047 its reverse (740002921), we get a palindrome (869202968).

The spelling of 129200047 in words is "one hundred twenty-nine million, two hundred thousand, forty-seven".