190321 has 2 divisors, whose sum is σ = 190322. Its totient is φ = 190320.

The previous prime is 190313. The next prime is 190331. The reversal of 190321 is 123091.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 190096 + 225 = 436^2 + 15^2 .

It is an emirp because it is prime and its reverse (123091) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 190321 - 2³ = 190313 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 190295 and 190304.

It is not a weakly prime, because it can be changed into another prime (190301) 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, 95160 + 95161.

It is an arithmetic number, because the mean of its divisors is an integer number (95161).

2¹⁹⁰³²¹ is an apocalyptic number.

It is an amenable number.

190321 is a deficient number, since it is larger than the sum of its proper divisors (1).

190321 is an equidigital number, since it uses as much as digits as its factorization.

190321 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 54, while the sum is 16.

The square root of 190321 is about 436.2579512169. The cubic root of 190321 is about 57.5213279419.

The spelling of 190321 in words is "one hundred ninety thousand, three hundred twenty-one".