68758769 has 2 divisors, whose sum is σ = 68758770. Its totient is φ = 68758768.

The previous prime is 68758757. The next prime is 68758813. The reversal of 68758769 is 96785786.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 63808144 + 4950625 = 7988^2 + 2225^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-68758769 is a prime.

It is a super-2 number, since 2×68758769² = 9455536628790722, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (68758969) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34379384 + 34379385.

It is an arithmetic number, because the mean of its divisors is an integer number (34379385).

Almost surely, 2^68758769 is an apocalyptic number.

It is an amenable number.

68758769 is a deficient number, since it is larger than the sum of its proper divisors (1).

68758769 is an equidigital number, since it uses as much as digits as its factorization.

68758769 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5080320, while the sum is 56.

The square root of 68758769 is about 8292.0907496240. The cubic root of 68758769 is about 409.6780518404.

The spelling of 68758769 in words is "sixty-eight million, seven hundred fifty-eight thousand, seven hundred sixty-nine".