129772772 has 6 divisors (see below), whose sum is σ = 227102358. Its totient is φ = 64886384.

The previous prime is 129772771. The next prime is 129772777. The reversal of 129772772 is 277277921.

It can be written as a sum of positive squares in only one way, i.e., 128504896 + 1267876 = 11336^2 + 1126^2 .

It is not an unprimeable number, because it can be changed into a prime (129772771) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16221593 + ... + 16221600.

It is an arithmetic number, because the mean of its divisors is an integer number (37850393).

Almost surely, 2^129772772 is an apocalyptic number.

It is an amenable number.

129772772 is a deficient number, since it is larger than the sum of its proper divisors (97329586).

129772772 is a wasteful number, since it uses less digits than its factorization.

129772772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32443197 (or 32443195 counting only the distinct ones).

The product of its digits is 172872, while the sum is 44.

The square root of 129772772 is about 11391.7852858979. The cubic root of 129772772 is about 506.2843782578.

The spelling of 129772772 in words is "one hundred twenty-nine million, seven hundred seventy-two thousand, seven hundred seventy-two".