285913 has 8 divisors (see below), whose sum is σ = 308736. Its totient is φ = 264000.

The previous prime is 285871. The next prime is 285937. The reversal of 285913 is 319582.

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 285913 - 2¹⁷ = 154841 is a prime.

It is a Duffinian number.

It is a plaindrome in base 15.

It is not an unprimeable number, because it can be changed into a prime (285953) 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, 513 + ... + 913.

It is an arithmetic number, because the mean of its divisors is an integer number (38592).

2²⁸⁵⁹¹³ is an apocalyptic number.

285913 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

285913 is a deficient number, since it is larger than the sum of its proper divisors (22823).

285913 is a wasteful number, since it uses less digits than its factorization.

285913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 455.

The product of its digits is 2160, while the sum is 28.

The square root of 285913 is about 534.7083317099. The cubic root of 285913 is about 65.8786413882.

The spelling of 285913 in words is "two hundred eighty-five thousand, nine hundred thirteen".