321403123 has 2 divisors, whose sum is σ = 321403124. Its totient is φ = 321403122.

The previous prime is 321403099. The next prime is 321403151. The reversal of 321403123 is 321304123.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 321403123 - 2²¹ = 319305971 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 321403123.

It is not a weakly prime, because it can be changed into another prime (321403153) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160701561 + 160701562.

It is an arithmetic number, because the mean of its divisors is an integer number (160701562).

Almost surely, 2^321403123 is an apocalyptic number.

321403123 is a deficient number, since it is larger than the sum of its proper divisors (1).

321403123 is an equidigital number, since it uses as much as digits as its factorization.

321403123 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 432, while the sum is 19.

The square root of 321403123 is about 17927.7194032035. The cubic root of 321403123 is about 684.9886321306.

Adding to 321403123 its reverse (321304123), we get a palindrome (642707246).

The spelling of 321403123 in words is "three hundred twenty-one million, four hundred three thousand, one hundred twenty-three".