68085977 has 2 divisors, whose sum is σ = 68085978. Its totient is φ = 68085976.

The previous prime is 68085959. The next prime is 68085991. The reversal of 68085977 is 77958086.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 37405456 + 30680521 = 6116^2 + 5539^2 .

It is a cyclic number.

It is not a de Polignac number, because 68085977 - 2¹⁴ = 68069593 is a prime.

It is not a weakly prime, because it can be changed into another prime (68085907) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34042988 + 34042989.

It is an arithmetic number, because the mean of its divisors is an integer number (34042989).

Almost surely, 2^68085977 is an apocalyptic number.

It is an amenable number.

68085977 is a deficient number, since it is larger than the sum of its proper divisors (1).

68085977 is an equidigital number, since it uses as much as digits as its factorization.

68085977 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 846720, while the sum is 50.

The square root of 68085977 is about 8251.4227258092. The cubic root of 68085977 is about 408.3374614974.

The spelling of 68085977 in words is "sixty-eight million, eighty-five thousand, nine hundred seventy-seven".