321532493 has 2 divisors, whose sum is σ = 321532494. Its totient is φ = 321532492.

The previous prime is 321532489. The next prime is 321532511. The reversal of 321532493 is 394235123.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 284833129 + 36699364 = 16877^2 + 6058^2 .

It is a cyclic number.

It is not a de Polignac number, because 321532493 - 2² = 321532489 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (321522493) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160766246 + 160766247.

It is an arithmetic number, because the mean of its divisors is an integer number (160766247).

Almost surely, 2^321532493 is an apocalyptic number.

It is an amenable number.

321532493 is a deficient number, since it is larger than the sum of its proper divisors (1).

321532493 is an equidigital number, since it uses as much as digits as its factorization.

321532493 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 19440, while the sum is 32.

The square root of 321532493 is about 17931.3271399526. The cubic root of 321532493 is about 685.0805261683.

The spelling of 321532493 in words is "three hundred twenty-one million, five hundred thirty-two thousand, four hundred ninety-three".