248991 has 4 divisors (see below), whose sum is σ = 331992. Its totient is φ = 165992.

The previous prime is 248987. The next prime is 249017. The reversal of 248991 is 199842.

248991 is digitally balanced in base 7, because in such base it contains all the possibile digits an equal number of times.

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 248991 - 2² = 248987 is a prime.

It is a D-number.

248991 is strictly pandigital in base 7.

248991 is a lucky number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 248991.

It is not an unprimeable number, because it can be changed into a prime (248971) 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, 41496 + ... + 41501.

It is an arithmetic number, because the mean of its divisors is an integer number (82998).

2²⁴⁸⁹⁹¹ is an apocalyptic number.

248991 is a deficient number, since it is larger than the sum of its proper divisors (83001).

248991 is an equidigital number, since it uses as much as digits as its factorization.

248991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83000.

The product of its digits is 5184, while the sum is 33.

The square root of 248991 is about 498.9899798593. The cubic root of 248991 is about 62.9111875312.

The spelling of 248991 in words is "two hundred forty-eight thousand, nine hundred ninety-one".