67981337 has 2 divisors, whose sum is σ = 67981338. Its totient is φ = 67981336.

The previous prime is 67981313. The next prime is 67981343. The reversal of 67981337 is 73318976.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 37687321 + 30294016 = 6139^2 + 5504^2 .

It is a cyclic number.

It is not a de Polignac number, because 67981337 - 2¹⁶ = 67915801 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (67981367) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33990668 + 33990669.

It is an arithmetic number, because the mean of its divisors is an integer number (33990669).

Almost surely, 2^67981337 is an apocalyptic number.

It is an amenable number.

67981337 is a deficient number, since it is larger than the sum of its proper divisors (1).

67981337 is an equidigital number, since it uses as much as digits as its factorization.

67981337 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 190512, while the sum is 44.

The square root of 67981337 is about 8245.0795629879. The cubic root of 67981337 is about 408.1281656333.

The spelling of 67981337 in words is "sixty-seven million, nine hundred eighty-one thousand, three hundred thirty-seven".