129672722 has 8 divisors (see below), whose sum is σ = 196293900. Its totient is φ = 64241424.

The previous prime is 129672713. The next prime is 129672749. The reversal of 129672722 is 227276921.

It can be written as a sum of positive squares in 2 ways, for example, as 113018161 + 16654561 = 10631^2 + 4081^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 297197 + ... + 297632.

Almost surely, 2^129672722 is an apocalyptic number.

129672722 is a deficient number, since it is larger than the sum of its proper divisors (66621178).

129672722 is a wasteful number, since it uses less digits than its factorization.

129672722 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 594940.

The product of its digits is 42336, while the sum is 38.

The square root of 129672722 is about 11387.3931169517. The cubic root of 129672722 is about 506.1542359734.

The spelling of 129672722 in words is "one hundred twenty-nine million, six hundred seventy-two thousand, seven hundred twenty-two".