68856461 has 2 divisors, whose sum is σ = 68856462. Its totient is φ = 68856460.

The previous prime is 68856419. The next prime is 68856509. The reversal of 68856461 is 16465886.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 50495236 + 18361225 = 7106^2 + 4285^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-68856461 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68856401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34428230 + 34428231.

It is an arithmetic number, because the mean of its divisors is an integer number (34428231).

Almost surely, 2^68856461 is an apocalyptic number.

It is an amenable number.

68856461 is a deficient number, since it is larger than the sum of its proper divisors (1).

68856461 is an equidigital number, since it uses as much as digits as its factorization.

68856461 is an evil number, because the sum of its binary digits is even.

The product of its digits is 276480, while the sum is 44.

The square root of 68856461 is about 8297.9793323435. The cubic root of 68856461 is about 409.8719826379.

The spelling of 68856461 in words is "sixty-eight million, eight hundred fifty-six thousand, four hundred sixty-one".