321204413 has 2 divisors, whose sum is σ = 321204414. Its totient is φ = 321204412.

The previous prime is 321204391. The next prime is 321204419. The reversal of 321204413 is 314402123.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 299878489 + 21325924 = 17317^2 + 4618^2 .

It is a cyclic number.

It is not a de Polignac number, because 321204413 - 2⁶ = 321204349 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (321204419) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160602206 + 160602207.

It is an arithmetic number, because the mean of its divisors is an integer number (160602207).

Almost surely, 2^321204413 is an apocalyptic number.

It is an amenable number.

321204413 is a deficient number, since it is larger than the sum of its proper divisors (1).

321204413 is an equidigital number, since it uses as much as digits as its factorization.

321204413 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 321204413 is about 17922.1765698254. The cubic root of 321204413 is about 684.8474364979.

Adding to 321204413 its reverse (314402123), we get a palindrome (635606536).

The spelling of 321204413 in words is "three hundred twenty-one million, two hundred four thousand, four hundred thirteen".