722243647 has 2 divisors, whose sum is σ = 722243648. Its totient is φ = 722243646.

The previous prime is 722243591. The next prime is 722243707. The reversal of 722243647 is 746342227.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-722243647 is a prime.

It is a super-3 number, since 3×722243647³ (a number of 28 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (722243747) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 361121823 + 361121824.

It is an arithmetic number, because the mean of its divisors is an integer number (361121824).

Almost surely, 2^722243647 is an apocalyptic number.

722243647 is a deficient number, since it is larger than the sum of its proper divisors (1).

722243647 is an equidigital number, since it uses as much as digits as its factorization.

722243647 is an evil number, because the sum of its binary digits is even.

The product of its digits is 112896, while the sum is 37.

The square root of 722243647 is about 26874.5911038661. The cubic root of 722243647 is about 897.2109737833.

The spelling of 722243647 in words is "seven hundred twenty-two million, two hundred forty-three thousand, six hundred forty-seven".