280313 has 8 divisors (see below), whose sum is σ = 324000. Its totient is φ = 239680.

The previous prime is 280303. The next prime is 280321. The reversal of 280313 is 313082.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 280313 - 2⁴ = 280297 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 280291 and 280300.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 280313.

It is not an unprimeable number, because it can be changed into a prime (280303) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 563 + ... + 936.

It is an arithmetic number, because the mean of its divisors is an integer number (40500).

2²⁸⁰³¹³ is an apocalyptic number.

It is an amenable number.

280313 is a deficient number, since it is larger than the sum of its proper divisors (43687).

280313 is a wasteful number, since it uses less digits than its factorization.

280313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1527.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 280313 is about 529.4459368056. The cubic root of 280313 is about 65.4456943583.

Adding to 280313 its reverse (313082), we get a palindrome (593395).

The spelling of 280313 in words is "two hundred eighty thousand, three hundred thirteen".