442164823 has 2 divisors, whose sum is σ = 442164824. Its totient is φ = 442164822.

The previous prime is 442164803. The next prime is 442164847. The reversal of 442164823 is 328461244.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-442164823 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (442164803) 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, 221082411 + 221082412.

It is an arithmetic number, because the mean of its divisors is an integer number (221082412).

Almost surely, 2^442164823 is an apocalyptic number.

442164823 is a deficient number, since it is larger than the sum of its proper divisors (1).

442164823 is an equidigital number, since it uses as much as digits as its factorization.

442164823 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 36864, while the sum is 34.

The square root of 442164823 is about 21027.7155915710. The cubic root of 442164823 is about 761.8358336579.

The spelling of 442164823 in words is "four hundred forty-two million, one hundred sixty-four thousand, eight hundred twenty-three".