129489722 has 8 divisors (see below), whose sum is σ = 195048000. Its totient is φ = 64473724.

The previous prime is 129489721. The next prime is 129489733. The reversal of 129489722 is 227984921.

129489722 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

It is not an unprimeable number, because it can be changed into a prime (129489721) 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 3 ways as a sum of consecutive naturals, for example, 134972 + ... + 135927.

It is an arithmetic number, because the mean of its divisors is an integer number (24381000).

Almost surely, 2^129489722 is an apocalyptic number.

129489722 is a deficient number, since it is larger than the sum of its proper divisors (65558278).

129489722 is a wasteful number, since it uses less digits than its factorization.

129489722 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 271140.

The product of its digits is 145152, while the sum is 44.

The square root of 129489722 is about 11379.3550783865. The cubic root of 129489722 is about 505.9160213082.

The spelling of 129489722 in words is "one hundred twenty-nine million, four hundred eighty-nine thousand, seven hundred twenty-two".