68878841 has 2 divisors, whose sum is σ = 68878842. Its totient is φ = 68878840.

The previous prime is 68878753. The next prime is 68878879. The reversal of 68878841 is 14887886.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 68823616 + 55225 = 8296^2 + 235^2 .

It is a cyclic number.

It is not a de Polignac number, because 68878841 - 2¹⁰ = 68877817 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 68878841.

It is not a weakly prime, because it can be changed into another prime (68878891) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34439420 + 34439421.

It is an arithmetic number, because the mean of its divisors is an integer number (34439421).

Almost surely, 2^68878841 is an apocalyptic number.

It is an amenable number.

68878841 is a deficient number, since it is larger than the sum of its proper divisors (1).

68878841 is an equidigital number, since it uses as much as digits as its factorization.

68878841 is an evil number, because the sum of its binary digits is even.

The product of its digits is 688128, while the sum is 50.

The square root of 68878841 is about 8299.3277438597. The cubic root of 68878841 is about 409.9163839002.

The spelling of 68878841 in words is "sixty-eight million, eight hundred seventy-eight thousand, eight hundred forty-one".