68375761 has 2 divisors, whose sum is σ = 68375762. Its totient is φ = 68375760.

The previous prime is 68375759. The next prime is 68375767. The reversal of 68375761 is 16757386.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 68310225 + 65536 = 8265^2 + 256^2 .

It is a cyclic number.

It is not a de Polignac number, because 68375761 - 2¹ = 68375759 is a prime.

Together with 68375759, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (68375767) 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, 34187880 + 34187881.

It is an arithmetic number, because the mean of its divisors is an integer number (34187881).

Almost surely, 2^68375761 is an apocalyptic number.

It is an amenable number.

68375761 is a deficient number, since it is larger than the sum of its proper divisors (1).

68375761 is an equidigital number, since it uses as much as digits as its factorization.

68375761 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 211680, while the sum is 43.

The square root of 68375761 is about 8268.9637198382. The cubic root of 68375761 is about 408.9159564523.

The spelling of 68375761 in words is "sixty-eight million, three hundred seventy-five thousand, seven hundred sixty-one".