68541139 has 2 divisors, whose sum is σ = 68541140. Its totient is φ = 68541138.

The previous prime is 68541133. The next prime is 68541149. The reversal of 68541139 is 93114586.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 68541139 - 2⁵ = 68541107 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 68541098 and 68541107.

It is not a weakly prime, because it can be changed into another prime (68541133) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34270569 + 34270570.

It is an arithmetic number, because the mean of its divisors is an integer number (34270570).

Almost surely, 2^68541139 is an apocalyptic number.

68541139 is a deficient number, since it is larger than the sum of its proper divisors (1).

68541139 is an equidigital number, since it uses as much as digits as its factorization.

68541139 is an evil number, because the sum of its binary digits is even.

The product of its digits is 25920, while the sum is 37.

The square root of 68541139 is about 8278.9576034668. The cubic root of 68541139 is about 409.2453678008.

The spelling of 68541139 in words is "sixty-eight million, five hundred forty-one thousand, one hundred thirty-nine".