321367997 has 2 divisors, whose sum is σ = 321367998. Its totient is φ = 321367996.

The previous prime is 321367933. The next prime is 321368009. The reversal of 321367997 is 799763123.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 289884676 + 31483321 = 17026^2 + 5611^2 .

It is a cyclic number.

It is not a de Polignac number, because 321367997 - 2⁶ = 321367933 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (321360997) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160683998 + 160683999.

It is an arithmetic number, because the mean of its divisors is an integer number (160683999).

Almost surely, 2^321367997 is an apocalyptic number.

It is an amenable number.

321367997 is a deficient number, since it is larger than the sum of its proper divisors (1).

321367997 is an equidigital number, since it uses as much as digits as its factorization.

321367997 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 428652, while the sum is 47.

The square root of 321367997 is about 17926.7397203172. The cubic root of 321367997 is about 684.9636771903.

The spelling of 321367997 in words is "three hundred twenty-one million, three hundred sixty-seven thousand, nine hundred ninety-seven".