68739877 has 2 divisors, whose sum is σ = 68739878. Its totient is φ = 68739876.

The previous prime is 68739859. The next prime is 68739899. The reversal of 68739877 is 77893786.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 65302561 + 3437316 = 8081^2 + 1854^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-68739877 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68739817) 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, 34369938 + 34369939.

It is an arithmetic number, because the mean of its divisors is an integer number (34369939).

Almost surely, 2^68739877 is an apocalyptic number.

It is an amenable number.

68739877 is a deficient number, since it is larger than the sum of its proper divisors (1).

68739877 is an equidigital number, since it uses as much as digits as its factorization.

68739877 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3556224, while the sum is 55.

The square root of 68739877 is about 8290.9515135478. The cubic root of 68739877 is about 409.6405276728.

The spelling of 68739877 in words is "sixty-eight million, seven hundred thirty-nine thousand, eight hundred seventy-seven".