68055139 has 2 divisors, whose sum is σ = 68055140. Its totient is φ = 68055138.

The previous prime is 68055089. The next prime is 68055149. The reversal of 68055139 is 93155086.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 68055139 - 2¹³ = 68046947 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 68055098 and 68055107.

It is not a weakly prime, because it can be changed into another prime (68055149) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34027569 + 34027570.

It is an arithmetic number, because the mean of its divisors is an integer number (34027570).

Almost surely, 2^68055139 is an apocalyptic number.

68055139 is a deficient number, since it is larger than the sum of its proper divisors (1).

68055139 is an equidigital number, since it uses as much as digits as its factorization.

68055139 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 32400, while the sum is 37.

The square root of 68055139 is about 8249.5538667252. The cubic root of 68055139 is about 408.2758031217.

The spelling of 68055139 in words is "sixty-eight million, fifty-five thousand, one hundred thirty-nine".