442020399937 has 2 divisors, whose sum is σ = 442020399938. Its totient is φ = 442020399936.

The previous prime is 442020399913. The next prime is 442020399959. The reversal of 442020399937 is 739993020244.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 283746917041 + 158273482896 = 532679^2 + 397836^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-442020399937 is a prime.

It is not a weakly prime, because it can be changed into another prime (442020399907) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 221010199968 + 221010199969.

It is an arithmetic number, because the mean of its divisors is an integer number (221010199969).

Almost surely, 2^442020399937 is an apocalyptic number.

It is an amenable number.

442020399937 is a deficient number, since it is larger than the sum of its proper divisors (1).

442020399937 is an equidigital number, since it uses as much as digits as its factorization.

442020399937 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2939328, while the sum is 52.

The spelling of 442020399937 in words is "four hundred forty-two billion, twenty million, three hundred ninety-nine thousand, nine hundred thirty-seven".