67944389 has 2 divisors, whose sum is σ = 67944390. Its totient is φ = 67944388.

The previous prime is 67944377. The next prime is 67944433. The reversal of 67944389 is 98344976.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 67650625 + 293764 = 8225^2 + 542^2 .

It is a cyclic number.

It is not a de Polignac number, because 67944389 - 2¹² = 67940293 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (67944689) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33972194 + 33972195.

It is an arithmetic number, because the mean of its divisors is an integer number (33972195).

Almost surely, 2^67944389 is an apocalyptic number.

It is an amenable number.

67944389 is a deficient number, since it is larger than the sum of its proper divisors (1).

67944389 is an equidigital number, since it uses as much as digits as its factorization.

67944389 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1306368, while the sum is 50.

The square root of 67944389 is about 8242.8386493974. The cubic root of 67944389 is about 408.0542127276.

The spelling of 67944389 in words is "sixty-seven million, nine hundred forty-four thousand, three hundred eighty-nine".