445324981 has 2 divisors, whose sum is σ = 445324982. Its totient is φ = 445324980.

The previous prime is 445324973. The next prime is 445325017. The reversal of 445324981 is 189423544.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 255712081 + 189612900 = 15991^2 + 13770^2 .

It is a cyclic number.

It is not a de Polignac number, because 445324981 - 2³ = 445324973 is a prime.

It is a super-2 number, since 2×445324981² = 396628677405300722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (445324931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 222662490 + 222662491.

It is an arithmetic number, because the mean of its divisors is an integer number (222662491).

Almost surely, 2^445324981 is an apocalyptic number.

It is an amenable number.

445324981 is a deficient number, since it is larger than the sum of its proper divisors (1).

445324981 is an equidigital number, since it uses as much as digits as its factorization.

445324981 is an evil number, because the sum of its binary digits is even.

The product of its digits is 138240, while the sum is 40.

The square root of 445324981 is about 21102.7244923493. The cubic root of 445324981 is about 763.6464772723.

The spelling of 445324981 in words is "four hundred forty-five million, three hundred twenty-four thousand, nine hundred eighty-one".