129967844 has 12 divisors (see below), whose sum is σ = 232733424. Its totient is φ = 63472584.

The previous prime is 129967837. The next prime is 129967853. The reversal of 129967844 is 448769921.

It is a junction number, because it is equal to n+sod(n) for n = 129967792 and 129967801.

It is an unprimeable number.

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 in 3 ways as a sum of consecutive naturals, for example, 377642 + ... + 377985.

It is an arithmetic number, because the mean of its divisors is an integer number (19394452).

Almost surely, 2^129967844 is an apocalyptic number.

It is an amenable number.

129967844 is a deficient number, since it is larger than the sum of its proper divisors (102765580).

129967844 is a wasteful number, since it uses less digits than its factorization.

129967844 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 755674 (or 755672 counting only the distinct ones).

The product of its digits is 870912, while the sum is 50.

The square root of 129967844 is about 11400.3440298966. The cubic root of 129967844 is about 506.5379303199.

The spelling of 129967844 in words is "one hundred twenty-nine million, nine hundred sixty-seven thousand, eight hundred forty-four".