442664461 has 2 divisors, whose sum is σ = 442664462. Its totient is φ = 442664460.

The previous prime is 442664459. The next prime is 442664473. The reversal of 442664461 is 164466244.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 441210025 + 1454436 = 21005^2 + 1206^2 .

It is a cyclic number.

It is not a de Polignac number, because 442664461 - 2¹ = 442664459 is a prime.

Together with 442664459, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 442664461.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (442664491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 221332230 + 221332231.

It is an arithmetic number, because the mean of its divisors is an integer number (221332231).

Almost surely, 2^442664461 is an apocalyptic number.

It is an amenable number.

442664461 is a deficient number, since it is larger than the sum of its proper divisors (1).

442664461 is an equidigital number, since it uses as much as digits as its factorization.

442664461 is an evil number, because the sum of its binary digits is even.

The product of its digits is 110592, while the sum is 37.

The square root of 442664461 is about 21039.5927004303. The cubic root of 442664461 is about 762.1226790676.

The spelling of 442664461 in words is "four hundred forty-two million, six hundred sixty-four thousand, four hundred sixty-one".