321949 has 2 divisors, whose sum is σ = 321950. Its totient is φ = 321948.

The previous prime is 321947. The next prime is 321961. The reversal of 321949 is 949123.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 308025 + 13924 = 555^2 + 118^2 .

It is a cyclic number.

It is not a de Polignac number, because 321949 - 2¹ = 321947 is a prime.

Together with 321947, it forms a pair of twin primes.

It is an Ulam number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (321947) 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, 160974 + 160975.

It is an arithmetic number, because the mean of its divisors is an integer number (160975).

2³²¹⁹⁴⁹ is an apocalyptic number.

It is an amenable number.

321949 is a deficient number, since it is larger than the sum of its proper divisors (1).

321949 is an equidigital number, since it uses as much as digits as its factorization.

321949 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1944, while the sum is 28.

The square root of 321949 is about 567.4054987397. The cubic root of 321949 is about 68.5376211904.

It can be divided in two parts, 3 and 21949, that added together give a cube (21952 = 28³).

The spelling of 321949 in words is "three hundred twenty-one thousand, nine hundred forty-nine".