5681722309 has 4 divisors (see below), whose sum is σ = 5690423916. Its totient is φ = 5673020704.

The previous prime is 5681722307. The next prime is 5681722327. The reversal of 5681722309 is 9032271865.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3636693025 + 2045029284 = 60305^2 + 45222^2 .

It is a cyclic number.

It is not a de Polignac number, because 5681722309 - 2¹ = 5681722307 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5681722301) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4349824 + ... + 4351129.

It is an arithmetic number, because the mean of its divisors is an integer number (1422605979).

Almost surely, 2^5681722309 is an apocalyptic number.

It is an amenable number.

5681722309 is a deficient number, since it is larger than the sum of its proper divisors (8701607).

5681722309 is an equidigital number, since it uses as much as digits as its factorization.

5681722309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8701606.

The product of its (nonzero) digits is 181440, while the sum is 43.

The square root of 5681722309 is about 75377.2001934272. The cubic root of 5681722309 is about 1784.4046021934.

The spelling of 5681722309 in words is "five billion, six hundred eighty-one million, seven hundred twenty-two thousand, three hundred nine".