68026139 has 2 divisors, whose sum is σ = 68026140. Its totient is φ = 68026138.

The previous prime is 68026109. The next prime is 68026159. The reversal of 68026139 is 93162086.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 68026139 - 2²⁰ = 66977563 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 68026099 and 68026108.

It is not a weakly prime, because it can be changed into another prime (68026109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34013069 + 34013070.

It is an arithmetic number, because the mean of its divisors is an integer number (34013070).

Almost surely, 2^68026139 is an apocalyptic number.

68026139 is a deficient number, since it is larger than the sum of its proper divisors (1).

68026139 is an equidigital number, since it uses as much as digits as its factorization.

68026139 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15552, while the sum is 35.

The square root of 68026139 is about 8247.7960086316. The cubic root of 68026139 is about 408.2178026992.

The spelling of 68026139 in words is "sixty-eight million, twenty-six thousand, one hundred thirty-nine".