321319 has 2 divisors, whose sum is σ = 321320. Its totient is φ = 321318.

The previous prime is 321313. The next prime is 321323. The reversal of 321319 is 913123.

321319 is nontrivially palindromic in base 13.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 321319 - 2³ = 321311 is a prime.

It is a super-2 number, since 2×321319² = 206491799522, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 321296 and 321305.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (321311) 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, 160659 + 160660.

It is an arithmetic number, because the mean of its divisors is an integer number (160660).

2³²¹³¹⁹ is an apocalyptic number.

321319 is a deficient number, since it is larger than the sum of its proper divisors (1).

321319 is an equidigital number, since it uses as much as digits as its factorization.

321319 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 162, while the sum is 19.

The square root of 321319 is about 566.8500683602. The cubic root of 321319 is about 68.4928864689.

The spelling of 321319 in words is "three hundred twenty-one thousand, three hundred nineteen".