323556421 has 2 divisors, whose sum is σ = 323556422. Its totient is φ = 323556420.

The previous prime is 323556397. The next prime is 323556437. The reversal of 323556421 is 124655323.

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., 298805796 + 24750625 = 17286^2 + 4975^2 .

It is a cyclic number.

It is not a de Polignac number, because 323556421 - 2⁷ = 323556293 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 (323556481) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 161778210 + 161778211.

It is an arithmetic number, because the mean of its divisors is an integer number (161778211).

Almost surely, 2^323556421 is an apocalyptic number.

It is an amenable number.

323556421 is a deficient number, since it is larger than the sum of its proper divisors (1).

323556421 is an equidigital number, since it uses as much as digits as its factorization.

323556421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 21600, while the sum is 31.

The square root of 323556421 is about 17987.6741409222. The cubic root of 323556421 is about 686.5149633713.

The spelling of 323556421 in words is "three hundred twenty-three million, five hundred fifty-six thousand, four hundred twenty-one".