442343897 has 2 divisors, whose sum is σ = 442343898. Its totient is φ = 442343896.

The previous prime is 442343887. The next prime is 442343911. The reversal of 442343897 is 798343244.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 413064976 + 29278921 = 20324^2 + 5411^2 .

It is a cyclic number.

It is not a de Polignac number, because 442343897 - 2⁶ = 442343833 is a prime.

It is not a weakly prime, because it can be changed into another prime (442343857) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 221171948 + 221171949.

It is an arithmetic number, because the mean of its divisors is an integer number (221171949).

Almost surely, 2^442343897 is an apocalyptic number.

It is an amenable number.

442343897 is a deficient number, since it is larger than the sum of its proper divisors (1).

442343897 is an equidigital number, since it uses as much as digits as its factorization.

442343897 is an evil number, because the sum of its binary digits is even.

The product of its digits is 580608, while the sum is 44.

The square root of 442343897 is about 21031.9732074763. The cubic root of 442343897 is about 761.9386660332.

The spelling of 442343897 in words is "four hundred forty-two million, three hundred forty-three thousand, eight hundred ninety-seven".