1722949913 has 2 divisors, whose sum is σ = 1722949914. Its totient is φ = 1722949912.

The previous prime is 1722949909. The next prime is 1722949927. The reversal of 1722949913 is 3199492271.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1141561369 + 581388544 = 33787^2 + 24112^2 .

It is a cyclic number.

It is not a de Polignac number, because 1722949913 - 2² = 1722949909 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (1722949973) 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, 861474956 + 861474957.

It is an arithmetic number, because the mean of its divisors is an integer number (861474957).

Almost surely, 2^1722949913 is an apocalyptic number.

It is an amenable number.

1722949913 is a deficient number, since it is larger than the sum of its proper divisors (1).

1722949913 is an equidigital number, since it uses as much as digits as its factorization.

1722949913 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 244944, while the sum is 47.

The square root of 1722949913 is about 41508.4318301716. The cubic root of 1722949913 is about 1198.8298577231.

The spelling of 1722949913 in words is "one billion, seven hundred twenty-two million, nine hundred forty-nine thousand, nine hundred thirteen".