68893709 has 2 divisors, whose sum is σ = 68893710. Its totient is φ = 68893708.

The previous prime is 68893663. The next prime is 68893723. The reversal of 68893709 is 90739886.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 51696100 + 17197609 = 7190^2 + 4147^2 .

It is a cyclic number.

It is not a de Polignac number, because 68893709 - 2⁸ = 68893453 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68893729) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34446854 + 34446855.

It is an arithmetic number, because the mean of its divisors is an integer number (34446855).

Almost surely, 2^68893709 is an apocalyptic number.

It is an amenable number.

68893709 is a deficient number, since it is larger than the sum of its proper divisors (1).

68893709 is an equidigital number, since it uses as much as digits as its factorization.

68893709 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 653184, while the sum is 50.

The square root of 68893709 is about 8300.2234307276. The cubic root of 68893709 is about 409.9458762582.

The spelling of 68893709 in words is "sixty-eight million, eight hundred ninety-three thousand, seven hundred nine".