283621 has 4 divisors (see below), whose sum is σ = 305452. Its totient is φ = 261792.

The previous prime is 283609. The next prime is 283631. The reversal of 283621 is 126382.

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 112225 + 171396 = 335^2 + 414^2 .

It is a cyclic number.

It is not a de Polignac number, because 283621 - 2¹⁵ = 250853 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 283592 and 283601.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (283601) 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, 10896 + ... + 10921.

It is an arithmetic number, because the mean of its divisors is an integer number (76363).

2²⁸³⁶²¹ is an apocalyptic number.

It is an amenable number.

283621 is a deficient number, since it is larger than the sum of its proper divisors (21831).

283621 is a wasteful number, since it uses less digits than its factorization.

283621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21830.

The product of its digits is 576, while the sum is 22.

The square root of 283621 is about 532.5607946517. The cubic root of 283621 is about 65.7021318327.

The spelling of 283621 in words is "two hundred eighty-three thousand, six hundred twenty-one".