321343499 has 2 divisors, whose sum is σ = 321343500. Its totient is φ = 321343498.

The previous prime is 321343493. The next prime is 321343507. The reversal of 321343499 is 994343123.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 321343499 - 2¹⁶ = 321277963 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (321343493) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160671749 + 160671750.

It is an arithmetic number, because the mean of its divisors is an integer number (160671750).

Almost surely, 2^321343499 is an apocalyptic number.

321343499 is a deficient number, since it is larger than the sum of its proper divisors (1).

321343499 is an equidigital number, since it uses as much as digits as its factorization.

321343499 is an evil number, because the sum of its binary digits is even.

The product of its digits is 69984, while the sum is 38.

The square root of 321343499 is about 17926.0564263309. The cubic root of 321343499 is about 684.9462717374.

The spelling of 321343499 in words is "three hundred twenty-one million, three hundred forty-three thousand, four hundred ninety-nine".