283681 has 4 divisors (see below), whose sum is σ = 292864. Its totient is φ = 274500.

The previous prime is 283669. The next prime is 283687. The reversal of 283681 is 186382.

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 283681 - 2⁷ = 283553 is a prime.

It is a super-2 number, since 2×283681² = 160949819522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (283687) 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, 4545 + ... + 4606.

It is an arithmetic number, because the mean of its divisors is an integer number (73216).

2²⁸³⁶⁸¹ is an apocalyptic number.

It is an amenable number.

283681 is a deficient number, since it is larger than the sum of its proper divisors (9183).

283681 is an equidigital number, since it uses as much as digits as its factorization.

283681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9182.

The product of its digits is 2304, while the sum is 28.

The square root of 283681 is about 532.6171232696. The cubic root of 283681 is about 65.7067645997.

The spelling of 283681 in words is "two hundred eighty-three thousand, six hundred eighty-one".