1723342321 has 16 divisors (see below), whose sum is σ = 1831434624. Its totient is φ = 1618296064.

The previous prime is 1723342319. The next prime is 1723342331. The reversal of 1723342321 is 1232433271.

It is a cyclic number.

It is not a de Polignac number, because 1723342321 - 2¹ = 1723342319 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1723342321.

It is not an unprimeable number, because it can be changed into a prime (1723342331) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 274995 + ... + 281191.

It is an arithmetic number, because the mean of its divisors is an integer number (114464664).

Almost surely, 2^1723342321 is an apocalyptic number.

It is an amenable number.

1723342321 is a deficient number, since it is larger than the sum of its proper divisors (108092303).

1723342321 is a wasteful number, since it uses less digits than its factorization.

1723342321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6440.

The product of its digits is 6048, while the sum is 28.

The square root of 1723342321 is about 41513.1584079072. The cubic root of 1723342321 is about 1198.9208634092.

Adding to 1723342321 its reverse (1232433271), we get a palindrome (2955775592).

The spelling of 1723342321 in words is "one billion, seven hundred twenty-three million, three hundred forty-two thousand, three hundred twenty-one".