67896581 has 2 divisors, whose sum is σ = 67896582. Its totient is φ = 67896580.

The previous prime is 67896559. The next prime is 67896583. The reversal of 67896581 is 18569876.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 64802500 + 3094081 = 8050^2 + 1759^2 .

It is a cyclic number.

It is not a de Polignac number, because 67896581 - 2²² = 63702277 is a prime.

It is a super-2 number, since 2×67896581² = 9219891422979122, which contains 22 as substring.

Together with 67896583, it forms a pair of twin primes.

It is a Chen prime.

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (67896583) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33948290 + 33948291.

It is an arithmetic number, because the mean of its divisors is an integer number (33948291).

Almost surely, 2^67896581 is an apocalyptic number.

It is an amenable number.

67896581 is a deficient number, since it is larger than the sum of its proper divisors (1).

67896581 is an equidigital number, since it uses as much as digits as its factorization.

67896581 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 725760, while the sum is 50.

The square root of 67896581 is about 8239.9381672437. The cubic root of 67896581 is about 407.9584832964.

The spelling of 67896581 in words is "sixty-seven million, eight hundred ninety-six thousand, five hundred eighty-one".