67304681 has 2 divisors, whose sum is σ = 67304682. Its totient is φ = 67304680.

The previous prime is 67304609. The next prime is 67304687. The reversal of 67304681 is 18640376.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 62552281 + 4752400 = 7909^2 + 2180^2 .

It is a cyclic number.

It is not a de Polignac number, because 67304681 - 2¹⁰ = 67303657 is a prime.

It is a super-2 number, since 2×67304681² = 9059840169023522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (67304687) 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, 33652340 + 33652341.

It is an arithmetic number, because the mean of its divisors is an integer number (33652341).

Almost surely, 2^67304681 is an apocalyptic number.

It is an amenable number.

67304681 is a deficient number, since it is larger than the sum of its proper divisors (1).

67304681 is an equidigital number, since it uses as much as digits as its factorization.

67304681 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24192, while the sum is 35.

The square root of 67304681 is about 8203.9430154042. The cubic root of 67304681 is about 406.7695391304.

It can be divided in two parts, 6730 and 4681, that added together give a palindrome (11411).

The spelling of 67304681 in words is "sixty-seven million, three hundred four thousand, six hundred eighty-one".