722172791 has 16 divisors (see below), whose sum is σ = 766886400. Its totient is φ = 678664800.

The previous prime is 722172779. The next prime is 722172809. The reversal of 722172791 is 197271227.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-722172791 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (722172391) 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 15 ways as a sum of consecutive naturals, for example, 378941 + ... + 380841.

It is an arithmetic number, because the mean of its divisors is an integer number (47930400).

Almost surely, 2^722172791 is an apocalyptic number.

722172791 is a deficient number, since it is larger than the sum of its proper divisors (44713609).

722172791 is a wasteful number, since it uses less digits than its factorization.

722172791 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2206.

The product of its digits is 24696, while the sum is 38.

The square root of 722172791 is about 26873.2728003122. The cubic root of 722172791 is about 897.1816324107.

The spelling of 722172791 in words is "seven hundred twenty-two million, one hundred seventy-two thousand, seven hundred ninety-one".