722173213 has 2 divisors, whose sum is σ = 722173214. Its totient is φ = 722173212.

The previous prime is 722173201. The next prime is 722173217. The reversal of 722173213 is 312371227.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 645820569 + 76352644 = 25413^2 + 8738^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-722173213 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (722173217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 361086606 + 361086607.

It is an arithmetic number, because the mean of its divisors is an integer number (361086607).

Almost surely, 2^722173213 is an apocalyptic number.

It is an amenable number.

722173213 is a deficient number, since it is larger than the sum of its proper divisors (1).

722173213 is an equidigital number, since it uses as much as digits as its factorization.

722173213 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3528, while the sum is 28.

The square root of 722173213 is about 26873.2806519785. The cubic root of 722173213 is about 897.1818071660.

The spelling of 722173213 in words is "seven hundred twenty-two million, one hundred seventy-three thousand, two hundred thirteen".