248635813 has 4 divisors (see below), whose sum is σ = 248691168. Its totient is φ = 248580460.

The previous prime is 248635789. The next prime is 248635837. The reversal of 248635813 is 318536842.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (248635789) and next prime (248635837).

It is a cyclic number.

It is not a de Polignac number, because 248635813 - 2²⁵ = 215081381 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 (248635613) 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, 20281 + ... + 30142.

It is an arithmetic number, because the mean of its divisors is an integer number (62172792).

Almost surely, 2^248635813 is an apocalyptic number.

It is an amenable number.

248635813 is a deficient number, since it is larger than the sum of its proper divisors (55355).

248635813 is an equidigital number, since it uses as much as digits as its factorization.

248635813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55354.

The product of its digits is 138240, while the sum is 40.

The square root of 248635813 is about 15768.1899088006. The cubic root of 248635813 is about 628.8125891316.

The spelling of 248635813 in words is "two hundred forty-eight million, six hundred thirty-five thousand, eight hundred thirteen".