445406081 has 2 divisors, whose sum is σ = 445406082. Its totient is φ = 445406080.

The previous prime is 445406057. The next prime is 445406123. The reversal of 445406081 is 180604544.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 380055025 + 65351056 = 19495^2 + 8084^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-445406081 is a prime.

It is a super-2 number, since 2×445406081² = 396773153983557122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (445406021) 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, 222703040 + 222703041.

It is an arithmetic number, because the mean of its divisors is an integer number (222703041).

Almost surely, 2^445406081 is an apocalyptic number.

It is an amenable number.

445406081 is a deficient number, since it is larger than the sum of its proper divisors (1).

445406081 is an equidigital number, since it uses as much as digits as its factorization.

445406081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15360, while the sum is 32.

The square root of 445406081 is about 21104.6459577032. The cubic root of 445406081 is about 763.6928314128.

The spelling of 445406081 in words is "four hundred forty-five million, four hundred six thousand, eighty-one".