68861797 has 2 divisors, whose sum is σ = 68861798. Its totient is φ = 68861796.

The previous prime is 68861777. The next prime is 68861801. The reversal of 68861797 is 79716886.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 62236321 + 6625476 = 7889^2 + 2574^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-68861797 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68861717) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34430898 + 34430899.

It is an arithmetic number, because the mean of its divisors is an integer number (34430899).

Almost surely, 2^68861797 is an apocalyptic number.

It is an amenable number.

68861797 is a deficient number, since it is larger than the sum of its proper divisors (1).

68861797 is an equidigital number, since it uses as much as digits as its factorization.

68861797 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1016064, while the sum is 52.

The square root of 68861797 is about 8298.3008501741. The cubic root of 68861797 is about 409.8825699785.

The spelling of 68861797 in words is "sixty-eight million, eight hundred sixty-one thousand, seven hundred ninety-seven".