442780193 has 2 divisors, whose sum is σ = 442780194. Its totient is φ = 442780192.

The previous prime is 442780111. The next prime is 442780213. The reversal of 442780193 is 391087244.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 298011169 + 144769024 = 17263^2 + 12032^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-442780193 is a prime.

It is not a weakly prime, because it can be changed into another prime (442780493) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 221390096 + 221390097.

It is an arithmetic number, because the mean of its divisors is an integer number (221390097).

Almost surely, 2^442780193 is an apocalyptic number.

It is an amenable number.

442780193 is a deficient number, since it is larger than the sum of its proper divisors (1).

442780193 is an equidigital number, since it uses as much as digits as its factorization.

442780193 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48384, while the sum is 38.

The square root of 442780193 is about 21042.3428591020. The cubic root of 442780193 is about 762.1890907662.

The spelling of 442780193 in words is "four hundred forty-two million, seven hundred eighty thousand, one hundred ninety-three".