129393944 has 16 divisors (see below), whose sum is σ = 243065400. Its totient is φ = 64576512.

The previous prime is 129393841. The next prime is 129393949. The reversal of 129393944 is 449393921.

It is a junction number, because it is equal to n+sod(n) for n = 129393895 and 129393904.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129393949) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10409 + ... + 19160.

Almost surely, 2^129393944 is an apocalyptic number.

It is an amenable number.

129393944 is a deficient number, since it is larger than the sum of its proper divisors (113671456).

129393944 is a wasteful number, since it uses less digits than its factorization.

129393944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30122 (or 30118 counting only the distinct ones).

The product of its digits is 209952, while the sum is 44.

The square root of 129393944 is about 11375.1458891743. The cubic root of 129393944 is about 505.7912557394.

The spelling of 129393944 in words is "one hundred twenty-nine million, three hundred ninety-three thousand, nine hundred forty-four".