321490843 has 4 divisors (see below), whose sum is σ = 321535888. Its totient is φ = 321445800.

The previous prime is 321490787. The next prime is 321490853. The reversal of 321490843 is 348094123.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 348094123 = 13 ⋅26776471.

It is a cyclic number.

It is not a de Polignac number, because 321490843 - 2⁹ = 321490331 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 321490799 and 321490808.

It is not an unprimeable number, because it can be changed into a prime (321490853) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9183 + ... + 26968.

It is an arithmetic number, because the mean of its divisors is an integer number (80383972).

Almost surely, 2^321490843 is an apocalyptic number.

321490843 is a deficient number, since it is larger than the sum of its proper divisors (45045).

321490843 is an equidigital number, since it uses as much as digits as its factorization.

321490843 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45044.

The product of its (nonzero) digits is 20736, while the sum is 34.

The square root of 321490843 is about 17930.1657270645. The cubic root of 321490843 is about 685.0509440507.

The spelling of 321490843 in words is "three hundred twenty-one million, four hundred ninety thousand, eight hundred forty-three".