838748681 has 2 divisors, whose sum is σ = 838748682. Its totient is φ = 838748680.

The previous prime is 838748653. The next prime is 838748683. The reversal of 838748681 is 186847838.

It is a happy number.

838748681 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., 838681600 + 67081 = 28960^2 + 259^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-838748681 is a prime.

It is a super-2 number, since 2×838748681² = 1406998699758479522, which contains 22 as substring.

Together with 838748683, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (838748683) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 419374340 + 419374341.

It is an arithmetic number, because the mean of its divisors is an integer number (419374341).

Almost surely, 2^838748681 is an apocalyptic number.

It is an amenable number.

838748681 is a deficient number, since it is larger than the sum of its proper divisors (1).

838748681 is an equidigital number, since it uses as much as digits as its factorization.

838748681 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2064384, while the sum is 53.

The square root of 838748681 is about 28961.1581432787. The cubic root of 838748681 is about 943.0700441684.

The spelling of 838748681 in words is "eight hundred thirty-eight million, seven hundred forty-eight thousand, six hundred eighty-one".