68650321 has 2 divisors, whose sum is σ = 68650322. Its totient is φ = 68650320.

The previous prime is 68650297. The next prime is 68650333. The reversal of 68650321 is 12305686.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 43046721 + 25603600 = 6561^2 + 5060^2 .

It is a cyclic number.

It is not a de Polignac number, because 68650321 - 2¹³ = 68642129 is a prime.

It is a super-4 number, since 4×68650321⁴ (a number of 32 digits) contains 4444 as substring.

It is not a weakly prime, because it can be changed into another prime (68650721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34325160 + 34325161.

It is an arithmetic number, because the mean of its divisors is an integer number (34325161).

Almost surely, 2^68650321 is an apocalyptic number.

It is an amenable number.

68650321 is a deficient number, since it is larger than the sum of its proper divisors (1).

68650321 is an equidigital number, since it uses as much as digits as its factorization.

68650321 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8640, while the sum is 31.

The square root of 68650321 is about 8285.5489256898. The cubic root of 68650321 is about 409.4625537808.

The spelling of 68650321 in words is "sixty-eight million, six hundred fifty thousand, three hundred twenty-one".