68239789 has 2 divisors, whose sum is σ = 68239790. Its totient is φ = 68239788.

The previous prime is 68239763. The next prime is 68239793. The reversal of 68239789 is 98793286.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 67322025 + 917764 = 8205^2 + 958^2 .

It is a cyclic number.

It is not a de Polignac number, because 68239789 - 2⁵ = 68239757 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68239189) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34119894 + 34119895.

It is an arithmetic number, because the mean of its divisors is an integer number (34119895).

Almost surely, 2^68239789 is an apocalyptic number.

It is an amenable number.

68239789 is a deficient number, since it is larger than the sum of its proper divisors (1).

68239789 is an equidigital number, since it uses as much as digits as its factorization.

68239789 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1306368, while the sum is 52.

The square root of 68239789 is about 8260.7377999789. The cubic root of 68239789 is about 408.6447198986.

The spelling of 68239789 in words is "sixty-eight million, two hundred thirty-nine thousand, seven hundred eighty-nine".