67313381 has 2 divisors, whose sum is σ = 67313382. Its totient is φ = 67313380.

The previous prime is 67313377. The next prime is 67313401. The reversal of 67313381 is 18331376.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 67092481 + 220900 = 8191^2 + 470^2 .

It is a cyclic number.

It is not a de Polignac number, because 67313381 - 2² = 67313377 is a prime.

It is a super-2 number, since 2×67313381² = 9062182523302322, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (67313681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33656690 + 33656691.

It is an arithmetic number, because the mean of its divisors is an integer number (33656691).

Almost surely, 2^67313381 is an apocalyptic number.

It is an amenable number.

67313381 is a deficient number, since it is larger than the sum of its proper divisors (1).

67313381 is an equidigital number, since it uses as much as digits as its factorization.

67313381 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9072, while the sum is 32.

The square root of 67313381 is about 8204.4732311100. The cubic root of 67313381 is about 406.7870651155.

The spelling of 67313381 in words is "sixty-seven million, three hundred thirteen thousand, three hundred eighty-one".