800749 has 4 divisors (see below), whose sum is σ = 803164. Its totient is φ = 798336.

The previous prime is 800743. The next prime is 800759. The reversal of 800749 is 947008.

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 611524 + 189225 = 782^2 + 435^2 .

It is a cyclic number.

It is not a de Polignac number, because 800749 - 2³ = 800741 is a prime.

It is a super-2 number, since 2×800749² = 1282397922002, which contains 22 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 (800741) 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, 612 + ... + 1405.

It is an arithmetic number, because the mean of its divisors is an integer number (200791).

2⁸⁰⁰⁷⁴⁹ is an apocalyptic number.

It is an amenable number.

800749 is a deficient number, since it is larger than the sum of its proper divisors (2415).

800749 is a wasteful number, since it uses less digits than its factorization.

800749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2414.

The product of its (nonzero) digits is 2016, while the sum is 28.

The square root of 800749 is about 894.8457967717. The cubic root of 800749 is about 92.8607388858.

The spelling of 800749 in words is "eight hundred thousand, seven hundred forty-nine".