803949309 has 6 divisors (see below), whose sum is σ = 1161260126. Its totient is φ = 535966200.

The previous prime is 803949287. The next prime is 803949313. The reversal of 803949309 is 903949308.

It can be written as a sum of positive squares in only one way, i.e., 803552409 + 396900 = 28347^2 + 630^2 .

It is not a de Polignac number, because 803949309 - 2⁵ = 803949277 is a prime.

It is a super-3 number, since 3×803949309³ (a number of 28 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (803949359) 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, 44663842 + ... + 44663859.

Almost surely, 2^803949309 is an apocalyptic number.

It is an amenable number.

803949309 is a deficient number, since it is larger than the sum of its proper divisors (357310817).

803949309 is a wasteful number, since it uses less digits than its factorization.

803949309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89327707 (or 89327704 counting only the distinct ones).

The product of its (nonzero) digits is 209952, while the sum is 45.

The square root of 803949309 is about 28353.9998765606. Note that the first 3 decimals coincide. The cubic root of 803949309 is about 929.8428489231.

Subtracting 803949309 from its reverse (903949308), we obtain a palindrome (99999999).

The spelling of 803949309 in words is "eight hundred three million, nine hundred forty-nine thousand, three hundred nine".