68121863 has 2 divisors, whose sum is σ = 68121864. Its totient is φ = 68121862.

The previous prime is 68121857. The next prime is 68121877. The reversal of 68121863 is 36812186.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 68121863 - 2¹⁶ = 68056327 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68121803) 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, 34060931 + 34060932.

It is an arithmetic number, because the mean of its divisors is an integer number (34060932).

Almost surely, 2^68121863 is an apocalyptic number.

68121863 is a deficient number, since it is larger than the sum of its proper divisors (1).

68121863 is an equidigital number, since it uses as much as digits as its factorization.

68121863 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13824, while the sum is 35.

The square root of 68121863 is about 8253.5969734413. The cubic root of 68121863 is about 408.4091895539.

The spelling of 68121863 in words is "sixty-eight million, one hundred twenty-one thousand, eight hundred sixty-three".