445809789 has 6 divisors (see below), whose sum is σ = 643947486. Its totient is φ = 297206520.

The previous prime is 445809773. The next prime is 445809797. The reversal of 445809789 is 987908544.

It can be written as a sum of positive squares in only one way, i.e., 381889764 + 63920025 = 19542^2 + 7995^2 .

It is not a de Polignac number, because 445809789 - 2⁴ = 445809773 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (445809709) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 24767202 + ... + 24767219.

It is an arithmetic number, because the mean of its divisors is an integer number (107324581).

Almost surely, 2^445809789 is an apocalyptic number.

It is an amenable number.

445809789 is a deficient number, since it is larger than the sum of its proper divisors (198137697).

445809789 is a wasteful number, since it uses less digits than its factorization.

445809789 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49534427 (or 49534424 counting only the distinct ones).

The product of its (nonzero) digits is 2903040, while the sum is 54.

The square root of 445809789 is about 21114.2082257422. The cubic root of 445809789 is about 763.9234941848.

The spelling of 445809789 in words is "four hundred forty-five million, eight hundred nine thousand, seven hundred eighty-nine".