809121244 has 6 divisors (see below), whose sum is σ = 1415962184. Its totient is φ = 404560620.

The previous prime is 809121241. The next prime is 809121253. The reversal of 809121244 is 442121908.

809121244 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (809121241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101140152 + ... + 101140159.

Almost surely, 2^809121244 is an apocalyptic number.

It is an amenable number.

809121244 is a deficient number, since it is larger than the sum of its proper divisors (606840940).

809121244 is a wasteful number, since it uses less digits than its factorization.

809121244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 202280315 (or 202280313 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 31.

The square root of 809121244 is about 28445.0565828230. The cubic root of 809121244 is about 931.8325311407.

The spelling of 809121244 in words is "eight hundred nine million, one hundred twenty-one thousand, two hundred forty-four".