805039749 has 16 divisors (see below), whose sum is σ = 1193363200. Its totient is φ = 536372928.

The previous prime is 805039727. The next prime is 805039769. The reversal of 805039749 is 947930508.

It is not a de Polignac number, because 805039749 - 2⁵ = 805039717 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (805039769) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 42612 + ... + 58530.

It is an arithmetic number, because the mean of its divisors is an integer number (74585200).

Almost surely, 2^805039749 is an apocalyptic number.

It is an amenable number.

805039749 is a deficient number, since it is larger than the sum of its proper divisors (388323451).

805039749 is a wasteful number, since it uses less digits than its factorization.

805039749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17801 (or 17795 counting only the distinct ones).

The product of its (nonzero) digits is 272160, while the sum is 45.

The square root of 805039749 is about 28373.2223936584. Note that the first 3 decimals coincide. The cubic root of 805039749 is about 930.2630577391.

The spelling of 805039749 in words is "eight hundred five million, thirty-nine thousand, seven hundred forty-nine".