68886691 has 2 divisors, whose sum is σ = 68886692. Its totient is φ = 68886690.

The previous prime is 68886677. The next prime is 68886749. The reversal of 68886691 is 19668886.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 68886691 - 2¹⁹ = 68362403 is a prime.

It is not a weakly prime, because it can be changed into another prime (68886611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34443345 + 34443346.

It is an arithmetic number, because the mean of its divisors is an integer number (34443346).

Almost surely, 2^68886691 is an apocalyptic number.

68886691 is a deficient number, since it is larger than the sum of its proper divisors (1).

68886691 is an equidigital number, since it uses as much as digits as its factorization.

68886691 is an evil number, because the sum of its binary digits is even.

The product of its digits is 995328, while the sum is 52.

The square root of 68886691 is about 8299.8006602568. The cubic root of 68886691 is about 409.9319557910.

The spelling of 68886691 in words is "sixty-eight million, eight hundred eighty-six thousand, six hundred ninety-one".