248935681 has 4 divisors (see below), whose sum is σ = 257519700. Its totient is φ = 240351664.

The previous prime is 248935679. The next prime is 248935697. The reversal of 248935681 is 186539842.

248935681 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 186539842 = 2 ⋅93269921.

It can be written as a sum of positive squares in 2 ways, for example, as 167935681 + 81000000 = 12959^2 + 9000^2 .

It is a cyclic number.

It is not a de Polignac number, because 248935681 - 2¹ = 248935679 is a prime.

It is a super-2 number, since 2×248935681² = 123937946549867522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (248935651) 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, 4291966 + ... + 4292023.

It is an arithmetic number, because the mean of its divisors is an integer number (64379925).

Almost surely, 2^248935681 is an apocalyptic number.

It is an amenable number.

248935681 is a deficient number, since it is larger than the sum of its proper divisors (8584019).

248935681 is an equidigital number, since it uses as much as digits as its factorization.

248935681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8584018.

The product of its digits is 414720, while the sum is 46.

The square root of 248935681 is about 15777.6956809288. The cubic root of 248935681 is about 629.0652813687.

The spelling of 248935681 in words is "two hundred forty-eight million, nine hundred thirty-five thousand, six hundred eighty-one".