67056989 has 2 divisors, whose sum is σ = 67056990. Its totient is φ = 67056988.

The previous prime is 67056971. The next prime is 67057009. The reversal of 67056989 is 98965076.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 41705764 + 25351225 = 6458^2 + 5035^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-67056989 is a prime.

It is a super-2 number, since 2×67056989² = 8993279547492242, which contains 22 as substring.

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 (67056919) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33528494 + 33528495.

It is an arithmetic number, because the mean of its divisors is an integer number (33528495).

Almost surely, 2^67056989 is an apocalyptic number.

It is an amenable number.

67056989 is a deficient number, since it is larger than the sum of its proper divisors (1).

67056989 is an equidigital number, since it uses as much as digits as its factorization.

67056989 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 816480, while the sum is 50.

The square root of 67056989 is about 8188.8331891668. The cubic root of 67056989 is about 406.2699334124.

The spelling of 67056989 in words is "sixty-seven million, fifty-six thousand, nine hundred eighty-nine".