442143937 has 2 divisors, whose sum is σ = 442143938. Its totient is φ = 442143936.

The previous prime is 442143913. The next prime is 442143953. The reversal of 442143937 is 739341244.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 226171521 + 215972416 = 15039^2 + 14696^2 .

It is a cyclic number.

It is not a de Polignac number, because 442143937 - 2⁷ = 442143809 is a prime.

It is a super-2 number, since 2×442143937² = 390982522051719938, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 442143896 and 442143905.

It is not a weakly prime, because it can be changed into another prime (442143997) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 221071968 + 221071969.

It is an arithmetic number, because the mean of its divisors is an integer number (221071969).

Almost surely, 2^442143937 is an apocalyptic number.

It is an amenable number.

442143937 is a deficient number, since it is larger than the sum of its proper divisors (1).

442143937 is an equidigital number, since it uses as much as digits as its factorization.

442143937 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 72576, while the sum is 37.

The square root of 442143937 is about 21027.2189554396. The cubic root of 442143937 is about 761.8238381659.

The spelling of 442143937 in words is "four hundred forty-two million, one hundred forty-three thousand, nine hundred thirty-seven".