722172706 has 4 divisors (see below), whose sum is σ = 1083259062. Its totient is φ = 361086352.

The previous prime is 722172643. The next prime is 722172707. The reversal of 722172706 is 607271227.

722172706 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 561263481 + 160909225 = 23691^2 + 12685^2 .

It is not an unprimeable number, because it can be changed into a prime (722172707) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 180543175 + ... + 180543178.

Almost surely, 2^722172706 is an apocalyptic number.

722172706 is a deficient number, since it is larger than the sum of its proper divisors (361086356).

722172706 is a wasteful number, since it uses less digits than its factorization.

722172706 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 361086355.

The product of its (nonzero) digits is 16464, while the sum is 34.

The square root of 722172706 is about 26873.2712188152. The cubic root of 722172706 is about 897.1815972112.

The spelling of 722172706 in words is "seven hundred twenty-two million, one hundred seventy-two thousand, seven hundred six".