68425639 has 2 divisors, whose sum is σ = 68425640. Its totient is φ = 68425638.

The previous prime is 68425619. The next prime is 68425657. The reversal of 68425639 is 93652486.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 68425639 - 2⁹ = 68425127 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 68425595 and 68425604.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68425619) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34212819 + 34212820.

It is an arithmetic number, because the mean of its divisors is an integer number (34212820).

Almost surely, 2^68425639 is an apocalyptic number.

68425639 is a deficient number, since it is larger than the sum of its proper divisors (1).

68425639 is an equidigital number, since it uses as much as digits as its factorization.

68425639 is an evil number, because the sum of its binary digits is even.

The product of its digits is 311040, while the sum is 43.

The square root of 68425639 is about 8271.9791464921. The cubic root of 68425639 is about 409.0153627936.

The spelling of 68425639 in words is "sixty-eight million, four hundred twenty-five thousand, six hundred thirty-nine".