248839747 has 4 divisors (see below), whose sum is σ = 267981280. Its totient is φ = 229698216.

The previous prime is 248839733. The next prime is 248839781. The reversal of 248839747 is 747938842.

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-248839747 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 248839694 and 248839703.

It is not an unprimeable number, because it can be changed into a prime (248839247) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9570747 + ... + 9570772.

It is an arithmetic number, because the mean of its divisors is an integer number (66995320).

Almost surely, 2^248839747 is an apocalyptic number.

248839747 is a deficient number, since it is larger than the sum of its proper divisors (19141533).

248839747 is a wasteful number, since it uses less digits than its factorization.

248839747 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19141532.

The product of its digits is 2709504, while the sum is 52.

The square root of 248839747 is about 15774.6552101781. The cubic root of 248839747 is about 628.9844619612.

The spelling of 248839747 in words is "two hundred forty-eight million, eight hundred thirty-nine thousand, seven hundred forty-seven".