442040323 has 2 divisors, whose sum is σ = 442040324. Its totient is φ = 442040322.

The previous prime is 442040297. The next prime is 442040351. The reversal of 442040323 is 323040244.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-442040323 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 442040294 and 442040303.

It is not a weakly prime, because it can be changed into another prime (442040383) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 221020161 + 221020162.

It is an arithmetic number, because the mean of its divisors is an integer number (221020162).

Almost surely, 2^442040323 is an apocalyptic number.

442040323 is a deficient number, since it is larger than the sum of its proper divisors (1).

442040323 is an equidigital number, since it uses as much as digits as its factorization.

442040323 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2304, while the sum is 22.

The square root of 442040323 is about 21024.7550045179. The cubic root of 442040323 is about 761.7643237745.

Adding to 442040323 its reverse (323040244), we get a palindrome (765080567).

The spelling of 442040323 in words is "four hundred forty-two million, forty thousand, three hundred twenty-three".