68217377 has 2 divisors, whose sum is σ = 68217378. Its totient is φ = 68217376.

The previous prime is 68217349. The next prime is 68217389. The reversal of 68217377 is 77371286.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 58920976 + 9296401 = 7676^2 + 3049^2 .

It is a cyclic number.

It is not a de Polignac number, because 68217377 - 2⁶ = 68217313 is a prime.

It is a super-2 number, since 2×68217377² = 9307221049520258, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (68219377) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34108688 + 34108689.

It is an arithmetic number, because the mean of its divisors is an integer number (34108689).

Almost surely, 2^68217377 is an apocalyptic number.

It is an amenable number.

68217377 is a deficient number, since it is larger than the sum of its proper divisors (1).

68217377 is an equidigital number, since it uses as much as digits as its factorization.

68217377 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 98784, while the sum is 41.

The square root of 68217377 is about 8259.3811511517. The cubic root of 68217377 is about 408.5999779260.

The spelling of 68217377 in words is "sixty-eight million, two hundred seventeen thousand, three hundred seventy-seven".