459991 has 4 divisors (see below), whose sum is σ = 525712. Its totient is φ = 394272.

The previous prime is 459961. The next prime is 460013. The reversal of 459991 is 199954.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 459991 - 2⁹ = 459479 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 459991.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (459961) 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, 32850 + ... + 32863.

It is an arithmetic number, because the mean of its divisors is an integer number (131428).

2⁴⁵⁹⁹⁹¹ is an apocalyptic number.

459991 is a deficient number, since it is larger than the sum of its proper divisors (65721).

459991 is an equidigital number, since it uses as much as digits as its factorization.

459991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65720.

The product of its digits is 14580, while the sum is 37.

The square root of 459991 is about 678.2263633920. The cubic root of 459991 is about 77.1939228484.

Subtracting from 459991 its sum of digits (37), we obtain a palindrome (459954).

It can be divided in two parts, 4 and 59991, that added together give a palindrome (59995).

The spelling of 459991 in words is "four hundred fifty-nine thousand, nine hundred ninety-one".