68657801 has 2 divisors, whose sum is σ = 68657802. Its totient is φ = 68657800.

The previous prime is 68657791. The next prime is 68657803. The reversal of 68657801 is 10875686.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 64561225 + 4096576 = 8035^2 + 2024^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-68657801 is a prime.

Together with 68657803, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (68657803) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34328900 + 34328901.

It is an arithmetic number, because the mean of its divisors is an integer number (34328901).

Almost surely, 2^68657801 is an apocalyptic number.

It is an amenable number.

68657801 is a deficient number, since it is larger than the sum of its proper divisors (1).

68657801 is an equidigital number, since it uses as much as digits as its factorization.

68657801 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 80640, while the sum is 41.

The square root of 68657801 is about 8286.0003017137. Note that the first 3 decimals coincide. The cubic root of 68657801 is about 409.4774246444.

The spelling of 68657801 in words is "sixty-eight million, six hundred fifty-seven thousand, eight hundred one".