442680461 has 2 divisors, whose sum is σ = 442680462. Its totient is φ = 442680460.

The previous prime is 442680443. The next prime is 442680463. The reversal of 442680461 is 164086244.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 435556900 + 7123561 = 20870^2 + 2669^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-442680461 is a prime.

Together with 442680463, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (442680463) 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, 221340230 + 221340231.

It is an arithmetic number, because the mean of its divisors is an integer number (221340231).

Almost surely, 2^442680461 is an apocalyptic number.

It is an amenable number.

442680461 is a deficient number, since it is larger than the sum of its proper divisors (1).

442680461 is an equidigital number, since it uses as much as digits as its factorization.

442680461 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36864, while the sum is 35.

The square root of 442680461 is about 21039.9729324921. The cubic root of 442680461 is about 762.1318612036.

The spelling of 442680461 in words is "four hundred forty-two million, six hundred eighty thousand, four hundred sixty-one".