248939 has 4 divisors (see below), whose sum is σ = 251256. Its totient is φ = 246624.

The previous prime is 248909. The next prime is 248971. The reversal of 248939 is 939842.

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 248939 - 2⁸ = 248683 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 248899 and 248908.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (248909) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 989 + ... + 1214.

It is an arithmetic number, because the mean of its divisors is an integer number (62814).

2²⁴⁸⁹³⁹ is an apocalyptic number.

248939 is a deficient number, since it is larger than the sum of its proper divisors (2317).

248939 is a wasteful number, since it uses less digits than its factorization.

248939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2316.

The product of its digits is 15552, while the sum is 35.

The square root of 248939 is about 498.9378718839. The cubic root of 248939 is about 62.9068077082.

The spelling of 248939 in words is "two hundred forty-eight thousand, nine hundred thirty-nine".