248939813 has 6 divisors (see below), whose sum is σ = 250644114. Its totient is φ = 247247024.

The previous prime is 248939807. The next prime is 248939837. The reversal of 248939813 is 318939842.

It is a happy number.

248939813 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 3 ways, for example, as 27019204 + 221920609 = 5198^2 + 14897^2 .

It is not a de Polignac number, because 248939813 - 2⁴ = 248939797 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (248939893) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 16595 + ... + 27807.

It is an arithmetic number, because the mean of its divisors is an integer number (41774019).

Almost surely, 2^248939813 is an apocalyptic number.

It is an amenable number.

248939813 is a deficient number, since it is larger than the sum of its proper divisors (1704301).

248939813 is an equidigital number, since it uses as much as digits as its factorization.

248939813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11511 (or 11362 counting only the distinct ones).

The product of its digits is 373248, while the sum is 47.

The square root of 248939813 is about 15777.8266247288. The cubic root of 248939813 is about 629.0687618974.

The spelling of 248939813 in words is "two hundred forty-eight million, nine hundred thirty-nine thousand, eight hundred thirteen".