6809149 has 2 divisors, whose sum is σ = 6809150. Its totient is φ = 6809148.

The previous prime is 6809141. The next prime is 6809167. The reversal of 6809149 is 9419086.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3980025 + 2829124 = 1995^2 + 1682^2 .

It is a cyclic number.

It is not a de Polignac number, because 6809149 - 2³ = 6809141 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6809141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3404574 + 3404575.

It is an arithmetic number, because the mean of its divisors is an integer number (3404575).

Almost surely, 2^6809149 is an apocalyptic number.

It is an amenable number.

6809149 is a deficient number, since it is larger than the sum of its proper divisors (1).

6809149 is an equidigital number, since it uses as much as digits as its factorization.

6809149 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15552, while the sum is 37.

The square root of 6809149 is about 2609.4346130915. The cubic root of 6809149 is about 189.5385756060.

The spelling of 6809149 in words is "six million, eight hundred nine thousand, one hundred forty-nine".