442947311 has 2 divisors, whose sum is σ = 442947312. Its totient is φ = 442947310.

The previous prime is 442947289. The next prime is 442947371. The reversal of 442947311 is 113749244.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-442947311 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (442947371) 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, 221473655 + 221473656.

It is an arithmetic number, because the mean of its divisors is an integer number (221473656).

Almost surely, 2^442947311 is an apocalyptic number.

442947311 is a deficient number, since it is larger than the sum of its proper divisors (1).

442947311 is an equidigital number, since it uses as much as digits as its factorization.

442947311 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 24192, while the sum is 35.

The square root of 442947311 is about 21046.3134776616. The cubic root of 442947311 is about 762.2849694112.

The spelling of 442947311 in words is "four hundred forty-two million, nine hundred forty-seven thousand, three hundred eleven".