68832139 has 2 divisors, whose sum is σ = 68832140. Its totient is φ = 68832138.

The previous prime is 68832131. The next prime is 68832191. The reversal of 68832139 is 93123886.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 68832139 - 2³ = 68832131 is a prime.

It is not a weakly prime, because it can be changed into another prime (68832131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34416069 + 34416070.

It is an arithmetic number, because the mean of its divisors is an integer number (34416070).

Almost surely, 2^68832139 is an apocalyptic number.

68832139 is a deficient number, since it is larger than the sum of its proper divisors (1).

68832139 is an equidigital number, since it uses as much as digits as its factorization.

68832139 is an evil number, because the sum of its binary digits is even.

The product of its digits is 62208, while the sum is 40.

The square root of 68832139 is about 8296.5136653898. The cubic root of 68832139 is about 409.8237175940.

The spelling of 68832139 in words is "sixty-eight million, eight hundred thirty-two thousand, one hundred thirty-nine".