68182921 has 2 divisors, whose sum is σ = 68182922. Its totient is φ = 68182920.

The previous prime is 68182913. The next prime is 68182931. The reversal of 68182921 is 12928186.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 60140025 + 8042896 = 7755^2 + 2836^2 .

It is a cyclic number.

It is not a de Polignac number, because 68182921 - 2³ = 68182913 is a prime.

It is not a weakly prime, because it can be changed into another prime (68182901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34091460 + 34091461.

It is an arithmetic number, because the mean of its divisors is an integer number (34091461).

Almost surely, 2^68182921 is an apocalyptic number.

It is an amenable number.

68182921 is a deficient number, since it is larger than the sum of its proper divisors (1).

68182921 is an equidigital number, since it uses as much as digits as its factorization.

68182921 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13824, while the sum is 37.

The square root of 68182921 is about 8257.2950171348. The cubic root of 68182921 is about 408.5311729164.

The spelling of 68182921 in words is "sixty-eight million, one hundred eighty-two thousand, nine hundred twenty-one".