722555173 has 2 divisors, whose sum is σ = 722555174. Its totient is φ = 722555172.

The previous prime is 722555149. The next prime is 722555209. The reversal of 722555173 is 371555227.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 561595204 + 160959969 = 23698^2 + 12687^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-722555173 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (722555773) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 361277586 + 361277587.

It is an arithmetic number, because the mean of its divisors is an integer number (361277587).

Almost surely, 2^722555173 is an apocalyptic number.

It is an amenable number.

722555173 is a deficient number, since it is larger than the sum of its proper divisors (1).

722555173 is an equidigital number, since it uses as much as digits as its factorization.

722555173 is an evil number, because the sum of its binary digits is even.

The product of its digits is 73500, while the sum is 37.

The square root of 722555173 is about 26880.3863997525. The cubic root of 722555173 is about 897.3399535121.

The spelling of 722555173 in words is "seven hundred twenty-two million, five hundred fifty-five thousand, one hundred seventy-three".