68136877 has 2 divisors, whose sum is σ = 68136878. Its totient is φ = 68136876.

The previous prime is 68136847. The next prime is 68136911. The reversal of 68136877 is 77863186.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 46430596 + 21706281 = 6814^2 + 4659^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-68136877 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68136847) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34068438 + 34068439.

It is an arithmetic number, because the mean of its divisors is an integer number (34068439).

Almost surely, 2^68136877 is an apocalyptic number.

It is an amenable number.

68136877 is a deficient number, since it is larger than the sum of its proper divisors (1).

68136877 is an equidigital number, since it uses as much as digits as its factorization.

68136877 is an evil number, because the sum of its binary digits is even.

The product of its digits is 338688, while the sum is 46.

The square root of 68136877 is about 8254.5064661674. The cubic root of 68136877 is about 408.4391916946.

The spelling of 68136877 in words is "sixty-eight million, one hundred thirty-six thousand, eight hundred seventy-seven".