248439823 has 4 divisors (see below), whose sum is σ = 248574760. Its totient is φ = 248304888.

The previous prime is 248439817. The next prime is 248439827. The reversal of 248439823 is 328934842.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-248439823 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 248439823.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (248439827) 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, 64668 + ... + 68401.

It is an arithmetic number, because the mean of its divisors is an integer number (62143690).

Almost surely, 2^248439823 is an apocalyptic number.

248439823 is a deficient number, since it is larger than the sum of its proper divisors (134937).

248439823 is a wasteful number, since it uses less digits than its factorization.

248439823 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134936.

The product of its digits is 331776, while the sum is 43.

The square root of 248439823 is about 15761.9739563292. The cubic root of 248439823 is about 628.6473228142.

The spelling of 248439823 in words is "two hundred forty-eight million, four hundred thirty-nine thousand, eight hundred twenty-three".