445534981 has 2 divisors, whose sum is σ = 445534982. Its totient is φ = 445534980.

The previous prime is 445534967. The next prime is 445535081. The reversal of 445534981 is 189435544.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 280026756 + 165508225 = 16734^2 + 12865^2 .

It is a cyclic number.

It is not a de Polignac number, because 445534981 - 2⁷ = 445534853 is a prime.

It is a super-2 number, since 2×445534981² = 397002838589340722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (445534951) 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, 222767490 + 222767491.

It is an arithmetic number, because the mean of its divisors is an integer number (222767491).

Almost surely, 2^445534981 is an apocalyptic number.

It is an amenable number.

445534981 is a deficient number, since it is larger than the sum of its proper divisors (1).

445534981 is an equidigital number, since it uses as much as digits as its factorization.

445534981 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 345600, while the sum is 43.

The square root of 445534981 is about 21107.6995667458. The cubic root of 445534981 is about 763.7664949119.

The spelling of 445534981 in words is "four hundred forty-five million, five hundred thirty-four thousand, nine hundred eighty-one".