68263439 has 2 divisors, whose sum is σ = 68263440. Its totient is φ = 68263438.

The previous prime is 68263427. The next prime is 68263441. The reversal of 68263439 is 93436286.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 68263439 - 2⁴ = 68263423 is a prime.

It is a Sophie Germain prime.

Together with 68263441, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 68263396 and 68263405.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68263469) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34131719 + 34131720.

It is an arithmetic number, because the mean of its divisors is an integer number (34131720).

Almost surely, 2^68263439 is an apocalyptic number.

68263439 is a deficient number, since it is larger than the sum of its proper divisors (1).

68263439 is an equidigital number, since it uses as much as digits as its factorization.

68263439 is an evil number, because the sum of its binary digits is even.

The product of its digits is 186624, while the sum is 41.

The square root of 68263439 is about 8262.1691461746. The cubic root of 68263439 is about 408.6919227182.

The spelling of 68263439 in words is "sixty-eight million, two hundred sixty-three thousand, four hundred thirty-nine".