67981841 has 2 divisors, whose sum is σ = 67981842. Its totient is φ = 67981840.

The previous prime is 67981831. The next prime is 67981843. The reversal of 67981841 is 14818976.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 67486225 + 495616 = 8215^2 + 704^2 .

It is a cyclic number.

It is not a de Polignac number, because 67981841 - 2¹⁸ = 67719697 is a prime.

Together with 67981843, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 67981792 and 67981801.

It is not a weakly prime, because it can be changed into another prime (67981843) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33990920 + 33990921.

It is an arithmetic number, because the mean of its divisors is an integer number (33990921).

Almost surely, 2^67981841 is an apocalyptic number.

It is an amenable number.

67981841 is a deficient number, since it is larger than the sum of its proper divisors (1).

67981841 is an equidigital number, since it uses as much as digits as its factorization.

67981841 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 96768, while the sum is 44.

The square root of 67981841 is about 8245.1101266144. The cubic root of 67981841 is about 408.1291742243.

The spelling of 67981841 in words is "sixty-seven million, nine hundred eighty-one thousand, eight hundred forty-one".