1722401773 has 2 divisors, whose sum is σ = 1722401774. Its totient is φ = 1722401772.

The previous prime is 1722401749. The next prime is 1722401777. The reversal of 1722401773 is 3771042271.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1184254569 + 538147204 = 34413^2 + 23198^2 .

It is a cyclic number.

It is not a de Polignac number, because 1722401773 - 2²⁵ = 1688847341 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1722401777) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 861200886 + 861200887.

It is an arithmetic number, because the mean of its divisors is an integer number (861200887).

Almost surely, 2^1722401773 is an apocalyptic number.

It is an amenable number.

1722401773 is a deficient number, since it is larger than the sum of its proper divisors (1).

1722401773 is an equidigital number, since it uses as much as digits as its factorization.

1722401773 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16464, while the sum is 34.

The square root of 1722401773 is about 41501.8285500772. The cubic root of 1722401773 is about 1198.7027121626.

The spelling of 1722401773 in words is "one billion, seven hundred twenty-two million, four hundred one thousand, seven hundred seventy-three".