322491643 has 2 divisors, whose sum is σ = 322491644. Its totient is φ = 322491642.

The previous prime is 322491641. The next prime is 322491679. The reversal of 322491643 is 346194223.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (346194223) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 322491643 - 2¹ = 322491641 is a prime.

Together with 322491641, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 322491599 and 322491608.

It is not a weakly prime, because it can be changed into another prime (322491641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 161245821 + 161245822.

It is an arithmetic number, because the mean of its divisors is an integer number (161245822).

Almost surely, 2^322491643 is an apocalyptic number.

322491643 is a deficient number, since it is larger than the sum of its proper divisors (1).

322491643 is an equidigital number, since it uses as much as digits as its factorization.

322491643 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 31104, while the sum is 34.

The square root of 322491643 is about 17958.0523164401. The cubic root of 322491643 is about 685.7610615185.

The spelling of 322491643 in words is "three hundred twenty-two million, four hundred ninety-one thousand, six hundred forty-three".