809957445 has 32 divisors (see below), whose sum is σ = 1426287744. Its totient is φ = 389222400.

The previous prime is 809957437. The next prime is 809957453. The reversal of 809957445 is 544759908.

It is an interprime number because it is at equal distance from previous prime (809957437) and next prime (809957453).

It is not a de Polignac number, because 809957445 - 2³ = 809957437 is a prime.

It is a congruent number.

It is an unprimeable number.

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 in 31 ways as a sum of consecutive naturals, for example, 3076 + ... + 40365.

It is an arithmetic number, because the mean of its divisors is an integer number (44571492).

Almost surely, 2^809957445 is an apocalyptic number.

It is an amenable number.

809957445 is a deficient number, since it is larger than the sum of its proper divisors (616330299).

809957445 is a wasteful number, since it uses less digits than its factorization.

809957445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43573.

The product of its (nonzero) digits is 1814400, while the sum is 51.

The square root of 809957445 is about 28459.7513165523. The cubic root of 809957445 is about 932.1534270213.

The spelling of 809957445 in words is "eight hundred nine million, nine hundred fifty-seven thousand, four hundred forty-five".