803945 has 4 divisors (see below), whose sum is σ = 964740. Its totient is φ = 643152.

The previous prime is 803939. The next prime is 803963. The reversal of 803945 is 549308.

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 369664 + 434281 = 608^2 + 659^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-803945 is a prime.

It is an Ulam number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 80390 + ... + 80399.

It is an arithmetic number, because the mean of its divisors is an integer number (241185).

2⁸⁰³⁹⁴⁵ is an apocalyptic number.

It is an amenable number.

803945 is a deficient number, since it is larger than the sum of its proper divisors (160795).

803945 is a wasteful number, since it uses less digits than its factorization.

803945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 160794.

The product of its (nonzero) digits is 4320, while the sum is 29.

The square root of 803945 is about 896.6298009770. The cubic root of 803945 is about 92.9841187666.

The spelling of 803945 in words is "eight hundred three thousand, nine hundred forty-five".