283891 has 4 divisors (see below), whose sum is σ = 285112. Its totient is φ = 282672.

The previous prime is 283873. The next prime is 283909. The reversal of 283891 is 198382.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 198382 = 2 ⋅99191.

It is an interprime number because it is at equal distance from previous prime (283873) and next prime (283909).

It is a cyclic number.

It is not a de Polignac number, because 283891 - 2⁵ = 283859 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (283831) 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, 141 + ... + 766.

It is an arithmetic number, because the mean of its divisors is an integer number (71278).

2²⁸³⁸⁹¹ is an apocalyptic number.

283891 is a deficient number, since it is larger than the sum of its proper divisors (1221).

283891 is an equidigital number, since it uses as much as digits as its factorization.

283891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1220.

The product of its digits is 3456, while the sum is 31.

The square root of 283891 is about 532.8142265368. The cubic root of 283891 is about 65.7229741415.

The spelling of 283891 in words is "two hundred eighty-three thousand, eight hundred ninety-one".