129789074 has 16 divisors (see below), whose sum is σ = 197805888. Its totient is φ = 63862032.

The previous prime is 129789071. The next prime is 129789089. The reversal of 129789074 is 470987921.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (129789071) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31667 + ... + 35529.

It is an arithmetic number, because the mean of its divisors is an integer number (12362868).

Almost surely, 2^129789074 is an apocalyptic number.

129789074 is a deficient number, since it is larger than the sum of its proper divisors (68016814).

129789074 is a wasteful number, since it uses less digits than its factorization.

129789074 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4129.

The product of its (nonzero) digits is 254016, while the sum is 47.

The square root of 129789074 is about 11392.5007790213. The cubic root of 129789074 is about 506.3055771124.

The spelling of 129789074 in words is "one hundred twenty-nine million, seven hundred eighty-nine thousand, seventy-four".