129447795 has 32 divisors (see below), whose sum is σ = 219700224. Its totient is φ = 64944000.

The previous prime is 129447763. The next prime is 129447797. The reversal of 129447795 is 597744921.

It is not a de Polignac number, because 129447795 - 2⁵ = 129447763 is a prime.

It is not an unprimeable number, because it can be changed into a prime (129447797) 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 31 ways as a sum of consecutive naturals, for example, 17970 + ... + 24120.

It is an arithmetic number, because the mean of its divisors is an integer number (6865632).

Almost surely, 2^129447795 is an apocalyptic number.

129447795 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

129447795 is a deficient number, since it is larger than the sum of its proper divisors (90252429).

129447795 is a wasteful number, since it uses less digits than its factorization.

129447795 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6243.

The product of its digits is 635040, while the sum is 48.

The square root of 129447795 is about 11377.5126895117. The cubic root of 129447795 is about 505.8614125191.

The spelling of 129447795 in words is "one hundred twenty-nine million, four hundred forty-seven thousand, seven hundred ninety-five".