6940289 has 2 divisors, whose sum is σ = 6940290. Its totient is φ = 6940288.

The previous prime is 6940279. The next prime is 6940331. The reversal of 6940289 is 9820496.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6682225 + 258064 = 2585^2 + 508^2 .

It is a cyclic number.

It is not a de Polignac number, because 6940289 - 2⁸ = 6940033 is a prime.

It is a super-2 number, since 2×6940289² = 96335222807042, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (6940279) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3470144 + 3470145.

It is an arithmetic number, because the mean of its divisors is an integer number (3470145).

Almost surely, 2^6940289 is an apocalyptic number.

It is an amenable number.

6940289 is a deficient number, since it is larger than the sum of its proper divisors (1).

6940289 is an equidigital number, since it uses as much as digits as its factorization.

6940289 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 31104, while the sum is 38.

The square root of 6940289 is about 2634.4428253428. The cubic root of 6940289 is about 190.7476451278.

The spelling of 6940289 in words is "six million, nine hundred forty thousand, two hundred eighty-nine".