1722319 has 2 divisors, whose sum is σ = 1722320. Its totient is φ = 1722318.

The previous prime is 1722307. The next prime is 1722323. The reversal of 1722319 is 9132271.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1722319 - 2⁷ = 1722191 is a prime.

It is a super-2 number, since 2×1722319² = 5932765475522, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1722293 and 1722302.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1722359) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 861159 + 861160.

It is an arithmetic number, because the mean of its divisors is an integer number (861160).

2^1722319 is an apocalyptic number.

1722319 is a deficient number, since it is larger than the sum of its proper divisors (1).

1722319 is an equidigital number, since it uses as much as digits as its factorization.

1722319 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 756, while the sum is 25.

The square root of 1722319 is about 1312.3715175209. The cubic root of 1722319 is about 119.8683509943.

The spelling of 1722319 in words is "one million, seven hundred twenty-two thousand, three hundred nineteen".