445989443 has 2 divisors, whose sum is σ = 445989444. Its totient is φ = 445989442.

The previous prime is 445989433. The next prime is 445989457. The reversal of 445989443 is 344989544.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 445989443 - 2¹⁸ = 445727299 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 445989391 and 445989400.

It is not a weakly prime, because it can be changed into another prime (445989433) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 222994721 + 222994722.

It is an arithmetic number, because the mean of its divisors is an integer number (222994722).

Almost surely, 2^445989443 is an apocalyptic number.

445989443 is a deficient number, since it is larger than the sum of its proper divisors (1).

445989443 is an equidigital number, since it uses as much as digits as its factorization.

445989443 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2488320, while the sum is 50.

The square root of 445989443 is about 21118.4621362447. The cubic root of 445989443 is about 764.0260965977.

The spelling of 445989443 in words is "four hundred forty-five million, nine hundred eighty-nine thousand, four hundred forty-three".