68842691 has 2 divisors, whose sum is σ = 68842692. Its totient is φ = 68842690.

The previous prime is 68842687. The next prime is 68842717. The reversal of 68842691 is 19624886.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 68842691 - 2² = 68842687 is a prime.

It is a super-2 number, since 2×68842691² = 9478632208242962, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (68844691) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34421345 + 34421346.

It is an arithmetic number, because the mean of its divisors is an integer number (34421346).

Almost surely, 2^68842691 is an apocalyptic number.

68842691 is a deficient number, since it is larger than the sum of its proper divisors (1).

68842691 is an equidigital number, since it uses as much as digits as its factorization.

68842691 is an evil number, because the sum of its binary digits is even.

The product of its digits is 165888, while the sum is 44.

The square root of 68842691 is about 8297.1495707863. The cubic root of 68842691 is about 409.8446585815.

The spelling of 68842691 in words is "sixty-eight million, eight hundred forty-two thousand, six hundred ninety-one".