321230491 has 2 divisors, whose sum is σ = 321230492. Its totient is φ = 321230490.

The previous prime is 321230461. The next prime is 321230513. The reversal of 321230491 is 194032123.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 321230491 - 2⁷ = 321230363 is a prime.

It is not a weakly prime, because it can be changed into another prime (321230431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160615245 + 160615246.

It is an arithmetic number, because the mean of its divisors is an integer number (160615246).

Almost surely, 2^321230491 is an apocalyptic number.

321230491 is a deficient number, since it is larger than the sum of its proper divisors (1).

321230491 is an equidigital number, since it uses as much as digits as its factorization.

321230491 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1296, while the sum is 25.

The square root of 321230491 is about 17922.9040894605. The cubic root of 321230491 is about 684.8659698341.

The spelling of 321230491 in words is "three hundred twenty-one million, two hundred thirty thousand, four hundred ninety-one".