283649 has 4 divisors (see below), whose sum is σ = 293460. Its totient is φ = 273840.

The previous prime is 283639. The next prime is 283669. The reversal of 283649 is 946382.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 946382 = 2 ⋅473191.

It can be written as a sum of positive squares in 2 ways, for example, as 135424 + 148225 = 368^2 + 385^2 .

It is a cyclic number.

It is not a de Polignac number, because 283649 - 2¹² = 279553 is a prime.

It is a Duffinian number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 283649.

It is not an unprimeable number, because it can be changed into a prime (283609) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4862 + ... + 4919.

It is an arithmetic number, because the mean of its divisors is an integer number (73365).

It is a Proth number, since it is equal to 277 ⋅ 2¹⁰ + 1 and 277 < 2¹⁰.

2²⁸³⁶⁴⁹ is an apocalyptic number.

283649 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

It is an amenable number.

283649 is a deficient number, since it is larger than the sum of its proper divisors (9811).

283649 is an equidigital number, since it uses as much as digits as its factorization.

283649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9810.

The product of its digits is 10368, while the sum is 32.

The square root of 283649 is about 532.5870820814. The cubic root of 283649 is about 65.7042938719.

The spelling of 283649 in words is "two hundred eighty-three thousand, six hundred forty-nine".