68748761 has 2 divisors, whose sum is σ = 68748762. Its totient is φ = 68748760.

The previous prime is 68748739. The next prime is 68748773. The reversal of 68748761 is 16784786.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 55651600 + 13097161 = 7460^2 + 3619^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-68748761 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (68748161) 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, 34374380 + 34374381.

It is an arithmetic number, because the mean of its divisors is an integer number (34374381).

Almost surely, 2^68748761 is an apocalyptic number.

It is an amenable number.

68748761 is a deficient number, since it is larger than the sum of its proper divisors (1).

68748761 is an equidigital number, since it uses as much as digits as its factorization.

68748761 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 451584, while the sum is 47.

The square root of 68748761 is about 8291.4872610407. The cubic root of 68748761 is about 409.6581743424.

The spelling of 68748761 in words is "sixty-eight million, seven hundred forty-eight thousand, seven hundred sixty-one".