445643323 has 2 divisors, whose sum is σ = 445643324. Its totient is φ = 445643322.

The previous prime is 445643299. The next prime is 445643399. The reversal of 445643323 is 323346544.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 445643323 - 2⁵ = 445643291 is a prime.

It is not a weakly prime, because it can be changed into another prime (445643923) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 222821661 + 222821662.

It is an arithmetic number, because the mean of its divisors is an integer number (222821662).

Almost surely, 2^445643323 is an apocalyptic number.

445643323 is a deficient number, since it is larger than the sum of its proper divisors (1).

445643323 is an equidigital number, since it uses as much as digits as its factorization.

445643323 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 103680, while the sum is 34.

The square root of 445643323 is about 21110.2658202117. The cubic root of 445643323 is about 763.8283989798.

Adding to 445643323 its reverse (323346544), we get a palindrome (768989867).

The spelling of 445643323 in words is "four hundred forty-five million, six hundred forty-three thousand, three hundred twenty-three".