68541881 has 2 divisors, whose sum is σ = 68541882. Its totient is φ = 68541880.

The previous prime is 68541859. The next prime is 68541917. The reversal of 68541881 is 18814586.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 67240000 + 1301881 = 8200^2 + 1141^2 .

It is a cyclic number.

It is not a de Polignac number, because 68541881 - 2²⁶ = 1433017 is a prime.

It is a super-2 number, since 2×68541881² = 9395978902036322, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (68541281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34270940 + 34270941.

It is an arithmetic number, because the mean of its divisors is an integer number (34270941).

Almost surely, 2^68541881 is an apocalyptic number.

It is an amenable number.

68541881 is a deficient number, since it is larger than the sum of its proper divisors (1).

68541881 is an equidigital number, since it uses as much as digits as its factorization.

68541881 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 61440, while the sum is 41.

The square root of 68541881 is about 8279.0024157503. The cubic root of 68541881 is about 409.2468445731.

The spelling of 68541881 in words is "sixty-eight million, five hundred forty-one thousand, eight hundred eighty-one".