321342403 has 2 divisors, whose sum is σ = 321342404. Its totient is φ = 321342402.

The previous prime is 321342391. The next prime is 321342409. The reversal of 321342403 is 304243123.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-321342403 is a prime.

It is not a weakly prime, because it can be changed into another prime (321342409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160671201 + 160671202.

It is an arithmetic number, because the mean of its divisors is an integer number (160671202).

Almost surely, 2^321342403 is an apocalyptic number.

321342403 is a deficient number, since it is larger than the sum of its proper divisors (1).

321342403 is an equidigital number, since it uses as much as digits as its factorization.

321342403 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1728, while the sum is 22.

The square root of 321342403 is about 17926.0258562795. The cubic root of 321342403 is about 684.9454930255.

Adding to 321342403 its reverse (304243123), we get a palindrome (625585526).

The spelling of 321342403 in words is "three hundred twenty-one million, three hundred forty-two thousand, four hundred three".