129800447 has 8 divisors (see below), whose sum is σ = 148684800. Its totient is φ = 111001464.

The previous prime is 129800443. The next prime is 129800459. The reversal of 129800447 is 744008921.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 129800447 - 2² = 129800443 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129800443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18047 + ... + 24192.

It is an arithmetic number, because the mean of its divisors is an integer number (18585600).

Almost surely, 2^129800447 is an apocalyptic number.

129800447 is a deficient number, since it is larger than the sum of its proper divisors (18884353).

129800447 is an equidigital number, since it uses as much as digits as its factorization.

129800447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42685.

The product of its (nonzero) digits is 16128, while the sum is 35.

The square root of 129800447 is about 11392.9999122268. Note that the first 4 decimals coincide. The cubic root of 129800447 is about 506.3203653247.

The spelling of 129800447 in words is "one hundred twenty-nine million, eight hundred thousand, four hundred forty-seven".