321968497 has 2 divisors, whose sum is σ = 321968498. Its totient is φ = 321968496.

The previous prime is 321968483. The next prime is 321968503. The reversal of 321968497 is 794869123.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 285474816 + 36493681 = 16896^2 + 6041^2 .

It is a cyclic number.

It is not a de Polignac number, because 321968497 - 2¹⁹ = 321444209 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 321968497.

It is not a weakly prime, because it can be changed into another prime (321968407) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160984248 + 160984249.

It is an arithmetic number, because the mean of its divisors is an integer number (160984249).

Almost surely, 2^321968497 is an apocalyptic number.

It is an amenable number.

321968497 is a deficient number, since it is larger than the sum of its proper divisors (1).

321968497 is an equidigital number, since it uses as much as digits as its factorization.

321968497 is an evil number, because the sum of its binary digits is even.

The product of its digits is 653184, while the sum is 49.

The square root of 321968497 is about 17943.4806266789. The cubic root of 321968497 is about 685.3900469213.

The spelling of 321968497 in words is "three hundred twenty-one million, nine hundred sixty-eight thousand, four hundred ninety-seven".