129709322 has 16 divisors (see below), whose sum is σ = 199639944. Its totient is φ = 63205600.

The previous prime is 129709313. The next prime is 129709357. The reversal of 129709322 is 223907921.

It is a Cunningham number, because it is equal to 11389²+1.

It can be written as a sum of positive squares in 4 ways, for example, as 1 + 129709321 = 1^2 + 11389^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 137372 + ... + 138312.

Almost surely, 2^129709322 is an apocalyptic number.

129709322 is a deficient number, since it is larger than the sum of its proper divisors (69930622).

129709322 is an frugal number, since it uses more digits than its factorization.

129709322 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1066 (or 984 counting only the distinct ones).

The product of its (nonzero) digits is 13608, while the sum is 35.

The square root of 129709322 is about 11389.0000439020. Note that the first 4 decimals coincide. The cubic root of 129709322 is about 506.2018520078.

It can be divided in two parts, 129709 and 322, that added together give a palindrome (130031).

The spelling of 129709322 in words is "one hundred twenty-nine million, seven hundred nine thousand, three hundred twenty-two".