803681 has 4 divisors (see below), whose sum is σ = 846000. Its totient is φ = 761364.

The previous prime is 803669. The next prime is 803687. The reversal of 803681 is 186308.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 803681 - 2¹⁸ = 541537 is a prime.

It is a super-2 number, since 2×803681² = 1291806299522, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 803681.

It is not an unprimeable number, because it can be changed into a prime (803687) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21131 + ... + 21168.

It is an arithmetic number, because the mean of its divisors is an integer number (211500).

2⁸⁰³⁶⁸¹ is an apocalyptic number.

It is an amenable number.

803681 is a deficient number, since it is larger than the sum of its proper divisors (42319).

803681 is a wasteful number, since it uses less digits than its factorization.

803681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42318.

The product of its (nonzero) digits is 1152, while the sum is 26.

The square root of 803681 is about 896.4825709405. The cubic root of 803681 is about 92.9739395898.

Adding to 803681 its reverse (186308), we get a palindrome (989989).

The spelling of 803681 in words is "eight hundred three thousand, six hundred eighty-one".