6740989 has 2 divisors, whose sum is σ = 6740990. Its totient is φ = 6740988.

The previous prime is 6740977. The next prime is 6740999. The reversal of 6740989 is 9890476.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6416089 + 324900 = 2533^2 + 570^2 .

It is a cyclic number.

It is not a de Polignac number, because 6740989 - 2⁷ = 6740861 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6740969) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3370494 + 3370495.

It is an arithmetic number, because the mean of its divisors is an integer number (3370495).

Almost surely, 2^6740989 is an apocalyptic number.

It is an amenable number.

6740989 is a deficient number, since it is larger than the sum of its proper divisors (1).

6740989 is an equidigital number, since it uses as much as digits as its factorization.

6740989 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 108864, while the sum is 43.

The square root of 6740989 is about 2596.3414644457. The cubic root of 6740989 is about 188.9040226373.

The spelling of 6740989 in words is "six million, seven hundred forty thousand, nine hundred eighty-nine".