321343073 has 2 divisors, whose sum is σ = 321343074. Its totient is φ = 321343072.

The previous prime is 321343063. The next prime is 321343151. The reversal of 321343073 is 370343123.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 228856384 + 92486689 = 15128^2 + 9617^2 .

It is a cyclic number.

It is not a de Polignac number, because 321343073 - 2¹² = 321338977 is a prime.

It is a super-2 number, since 2×321343073² = 206522741130166658, which contains 22 as substring.

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 (321343063) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160671536 + 160671537.

It is an arithmetic number, because the mean of its divisors is an integer number (160671537).

Almost surely, 2^321343073 is an apocalyptic number.

It is an amenable number.

321343073 is a deficient number, since it is larger than the sum of its proper divisors (1).

321343073 is an equidigital number, since it uses as much as digits as its factorization.

321343073 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4536, while the sum is 26.

The square root of 321343073 is about 17926.0445441821. The cubic root of 321343073 is about 684.9459690631.

Adding to 321343073 its reverse (370343123), we get a palindrome (691686196).

Subtracting 321343073 from its reverse (370343123), we obtain a triangular number (49000050 = T₉₈₉₉).

The spelling of 321343073 in words is "three hundred twenty-one million, three hundred forty-three thousand, seventy-three".