722173493 has 2 divisors, whose sum is σ = 722173494. Its totient is φ = 722173492.

The previous prime is 722173477. The next prime is 722173513. The reversal of 722173493 is 394371227.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 456548689 + 265624804 = 21367^2 + 16298^2 .

It is a cyclic number.

It is not a de Polignac number, because 722173493 - 2⁴ = 722173477 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is equal to p_37340759 and since 722173493 and 37340759 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (722173423) 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, 361086746 + 361086747.

It is an arithmetic number, because the mean of its divisors is an integer number (361086747).

Almost surely, 2^722173493 is an apocalyptic number.

It is an amenable number.

722173493 is a deficient number, since it is larger than the sum of its proper divisors (1).

722173493 is an equidigital number, since it uses as much as digits as its factorization.

722173493 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 63504, while the sum is 38.

The square root of 722173493 is about 26873.2858616136. The cubic root of 722173493 is about 897.1819231174.

The spelling of 722173493 in words is "seven hundred twenty-two million, one hundred seventy-three thousand, four hundred ninety-three".