129448799 has 2 divisors, whose sum is σ = 129448800. Its totient is φ = 129448798.

The previous prime is 129448751. The next prime is 129448801. The reversal of 129448799 is 997844921.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-129448799 is a prime.

It is a Sophie Germain prime.

Together with 129448801, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 129448799.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (129448399) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64724399 + 64724400.

It is an arithmetic number, because the mean of its divisors is an integer number (64724400).

Almost surely, 2^129448799 is an apocalyptic number.

129448799 is a deficient number, since it is larger than the sum of its proper divisors (1).

129448799 is an equidigital number, since it uses as much as digits as its factorization.

129448799 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1306368, while the sum is 53.

The square root of 129448799 is about 11377.5568115479. The cubic root of 129448799 is about 505.8627203399.

The spelling of 129448799 in words is "one hundred twenty-nine million, four hundred forty-eight thousand, seven hundred ninety-nine".