68711957 has 2 divisors, whose sum is σ = 68711958. Its totient is φ = 68711956.

The previous prime is 68711947. The next prime is 68711963. The reversal of 68711957 is 75911786.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 44809636 + 23902321 = 6694^2 + 4889^2 .

It is a cyclic number.

It is not a de Polignac number, because 68711957 - 2¹⁰ = 68710933 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68711927) 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, 34355978 + 34355979.

It is an arithmetic number, because the mean of its divisors is an integer number (34355979).

Almost surely, 2^68711957 is an apocalyptic number.

It is an amenable number.

68711957 is a deficient number, since it is larger than the sum of its proper divisors (1).

68711957 is an equidigital number, since it uses as much as digits as its factorization.

68711957 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 105840, while the sum is 44.

The square root of 68711957 is about 8289.2675792256. The cubic root of 68711957 is about 409.5850590819.

The spelling of 68711957 in words is "sixty-eight million, seven hundred eleven thousand, nine hundred fifty-seven".