68205637 has 2 divisors, whose sum is σ = 68205638. Its totient is φ = 68205636.

The previous prime is 68205629. The next prime is 68205679. The reversal of 68205637 is 73650286.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 38328481 + 29877156 = 6191^2 + 5466^2 .

It is a cyclic number.

It is not a de Polignac number, because 68205637 - 2³ = 68205629 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 68205596 and 68205605.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68205607) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34102818 + 34102819.

It is an arithmetic number, because the mean of its divisors is an integer number (34102819).

Almost surely, 2^68205637 is an apocalyptic number.

It is an amenable number.

68205637 is a deficient number, since it is larger than the sum of its proper divisors (1).

68205637 is an equidigital number, since it uses as much as digits as its factorization.

68205637 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 60480, while the sum is 37.

The square root of 68205637 is about 8258.6704135714. The cubic root of 68205637 is about 408.5765369830.

The spelling of 68205637 in words is "sixty-eight million, two hundred five thousand, six hundred thirty-seven".