442004681 has 2 divisors, whose sum is σ = 442004682. Its totient is φ = 442004680.

The previous prime is 442004677. The next prime is 442004687. The reversal of 442004681 is 186400244.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 304153600 + 137851081 = 17440^2 + 11741^2 .

It is a cyclic number.

It is not a de Polignac number, because 442004681 - 2² = 442004677 is a prime.

It is a super-2 number, since 2×442004681² = 390736276051823522, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (442004687) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 221002340 + 221002341.

It is an arithmetic number, because the mean of its divisors is an integer number (221002341).

Almost surely, 2^442004681 is an apocalyptic number.

It is an amenable number.

442004681 is a deficient number, since it is larger than the sum of its proper divisors (1).

442004681 is an equidigital number, since it uses as much as digits as its factorization.

442004681 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6144, while the sum is 29.

The square root of 442004681 is about 21023.9073675661. The cubic root of 442004681 is about 761.7438493725.

The spelling of 442004681 in words is "four hundred forty-two million, four thousand, six hundred eighty-one".