129900047 has 2 divisors, whose sum is σ = 129900048. Its totient is φ = 129900046.

The previous prime is 129900041. The next prime is 129900053. The reversal of 129900047 is 740009921.

It is a balanced prime because it is at equal distance from previous prime (129900041) and next prime (129900053).

It is a cyclic number.

It is not a de Polignac number, because 129900047 - 2⁴ = 129900031 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 129899986 and 129900022.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (129900041) 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, 64950023 + 64950024.

It is an arithmetic number, because the mean of its divisors is an integer number (64950024).

Almost surely, 2^129900047 is an apocalyptic number.

129900047 is a deficient number, since it is larger than the sum of its proper divisors (1).

129900047 is an equidigital number, since it uses as much as digits as its factorization.

129900047 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4536, while the sum is 32.

The square root of 129900047 is about 11397.3701791247. The cubic root of 129900047 is about 506.4498374396.

Adding to 129900047 its reverse (740009921), we get a palindrome (869909968).

The spelling of 129900047 in words is "one hundred twenty-nine million, nine hundred thousand, forty-seven".