67013281 has 2 divisors, whose sum is σ = 67013282. Its totient is φ = 67013280.

The previous prime is 67013273. The next prime is 67013369. The reversal of 67013281 is 18231076.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 64320400 + 2692881 = 8020^2 + 1641^2 .

It is a cyclic number.

It is not a de Polignac number, because 67013281 - 2³ = 67013273 is a prime.

It is a super-2 number, since 2×67013281² = 8981559660769922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (67013081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33506640 + 33506641.

It is an arithmetic number, because the mean of its divisors is an integer number (33506641).

Almost surely, 2^67013281 is an apocalyptic number.

It is an amenable number.

67013281 is a deficient number, since it is larger than the sum of its proper divisors (1).

67013281 is an equidigital number, since it uses as much as digits as its factorization.

67013281 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2016, while the sum is 28.

The square root of 67013281 is about 8186.1639978686. The cubic root of 67013281 is about 406.1816447991.

The spelling of 67013281 in words is "sixty-seven million, thirteen thousand, two hundred eighty-one".