68542339 has 2 divisors, whose sum is σ = 68542340. Its totient is φ = 68542338.

The previous prime is 68542321. The next prime is 68542349. The reversal of 68542339 is 93324586.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 68542339 - 2⁵ = 68542307 is a prime.

It is not a weakly prime, because it can be changed into another prime (68542349) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34271169 + 34271170.

It is an arithmetic number, because the mean of its divisors is an integer number (34271170).

Almost surely, 2^68542339 is an apocalyptic number.

68542339 is a deficient number, since it is larger than the sum of its proper divisors (1).

68542339 is an equidigital number, since it uses as much as digits as its factorization.

68542339 is an evil number, because the sum of its binary digits is even.

The product of its digits is 155520, while the sum is 40.

The square root of 68542339 is about 8279.0300760415. The cubic root of 68542339 is about 409.2477561065.

The spelling of 68542339 in words is "sixty-eight million, five hundred forty-two thousand, three hundred thirty-nine".