248813681 has 2 divisors, whose sum is σ = 248813682. Its totient is φ = 248813680.

The previous prime is 248813659. The next prime is 248813689. The reversal of 248813681 is 186318842.

248813681 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 199939600 + 48874081 = 14140^2 + 6991^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-248813681 is a prime.

It is a super-2 number, since 2×248813681² = 123816495705539522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (248813689) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 124406840 + 124406841.

It is an arithmetic number, because the mean of its divisors is an integer number (124406841).

Almost surely, 2^248813681 is an apocalyptic number.

It is an amenable number.

248813681 is a deficient number, since it is larger than the sum of its proper divisors (1).

248813681 is an equidigital number, since it uses as much as digits as its factorization.

248813681 is an evil number, because the sum of its binary digits is even.

The product of its digits is 73728, while the sum is 41.

The square root of 248813681 is about 15773.8289898173. The cubic root of 248813681 is about 628.9624991228.

The spelling of 248813681 in words is "two hundred forty-eight million, eight hundred thirteen thousand, six hundred eighty-one".