68016869 has 2 divisors, whose sum is σ = 68016870. Its totient is φ = 68016868.

The previous prime is 68016863. The next prime is 68016887. The reversal of 68016869 is 96861086.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 57532225 + 10484644 = 7585^2 + 3238^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-68016869 is a prime.

It is a super-2 number, since 2×68016869² = 9252588937126322, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68016863) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34008434 + 34008435.

It is an arithmetic number, because the mean of its divisors is an integer number (34008435).

Almost surely, 2^68016869 is an apocalyptic number.

It is an amenable number.

68016869 is a deficient number, since it is larger than the sum of its proper divisors (1).

68016869 is an equidigital number, since it uses as much as digits as its factorization.

68016869 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 124416, while the sum is 44.

The square root of 68016869 is about 8247.2340211734. The cubic root of 68016869 is about 408.1992590874.

The spelling of 68016869 in words is "sixty-eight million, sixteen thousand, eight hundred sixty-nine".