68886121 has 2 divisors, whose sum is σ = 68886122. Its totient is φ = 68886120.

The previous prime is 68886079. The next prime is 68886131. The reversal of 68886121 is 12168886.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 41731600 + 27154521 = 6460^2 + 5211^2 .

It is a cyclic number.

It is not a de Polignac number, because 68886121 - 2²³ = 60497513 is a prime.

It is not a weakly prime, because it can be changed into another prime (68886131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34443060 + 34443061.

It is an arithmetic number, because the mean of its divisors is an integer number (34443061).

Almost surely, 2^68886121 is an apocalyptic number.

It is an amenable number.

68886121 is a deficient number, since it is larger than the sum of its proper divisors (1).

68886121 is an equidigital number, since it uses as much as digits as its factorization.

68886121 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 36864, while the sum is 40.

The square root of 68886121 is about 8299.7663220117. The cubic root of 68886121 is about 409.9308251330.

The spelling of 68886121 in words is "sixty-eight million, eight hundred eighty-six thousand, one hundred twenty-one".