896831809 has 4 divisors (see below), whose sum is σ = 897042004. Its totient is φ = 896621616.

The previous prime is 896831797. The next prime is 896831813. The reversal of 896831809 is 908138698.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 755150400 + 141681409 = 27480^2 + 11903^2 .

It is a cyclic number.

It is not a de Polignac number, because 896831809 - 2⁷ = 896831681 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (896831839) 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 in 3 ways as a sum of consecutive naturals, for example, 98562 + ... + 107275.

It is an arithmetic number, because the mean of its divisors is an integer number (224260501).

Almost surely, 2^896831809 is an apocalyptic number.

It is an amenable number.

896831809 is a deficient number, since it is larger than the sum of its proper divisors (210195).

896831809 is a wasteful number, since it uses less digits than its factorization.

896831809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 210194.

The product of its (nonzero) digits is 746496, while the sum is 52.

The square root of 896831809 is about 29947.1502650920. The cubic root of 896831809 is about 964.3551434621.

The spelling of 896831809 in words is "eight hundred ninety-six million, eight hundred thirty-one thousand, eight hundred nine".