722205791 has 4 divisors (see below), whose sum is σ = 745502784. Its totient is φ = 698908800.

The previous prime is 722205761. The next prime is 722205817. The reversal of 722205791 is 197502227.

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

It is a cyclic number.

It is not a de Polignac number, because 722205791 - 2¹⁰ = 722204767 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 (722205761) 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 3 ways as a sum of consecutive naturals, for example, 11648450 + ... + 11648511.

It is an arithmetic number, because the mean of its divisors is an integer number (186375696).

Almost surely, 2^722205791 is an apocalyptic number.

722205791 is a deficient number, since it is larger than the sum of its proper divisors (23296993).

722205791 is a wasteful number, since it uses less digits than its factorization.

722205791 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23296992.

The product of its (nonzero) digits is 17640, while the sum is 35.

The square root of 722205791 is about 26873.8867862466. The cubic root of 722205791 is about 897.1952979043.

The spelling of 722205791 in words is "seven hundred twenty-two million, two hundred five thousand, seven hundred ninety-one".