6820149 has 16 divisors (see below), whose sum is σ = 10526720. Its totient is φ = 3846960.

The previous prime is 6820147. The next prime is 6820157. The reversal of 6820149 is 9410286.

It is not a de Polignac number, because 6820149 - 2¹ = 6820147 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6820141) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 397 + ... + 3714.

It is an arithmetic number, because the mean of its divisors is an integer number (657920).

Almost surely, 2^6820149 is an apocalyptic number.

It is an amenable number.

6820149 is a deficient number, since it is larger than the sum of its proper divisors (3706571).

6820149 is a wasteful number, since it uses less digits than its factorization.

6820149 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4200.

The product of its (nonzero) digits is 3456, while the sum is 30.

The square root of 6820149 is about 2611.5414988087. The cubic root of 6820149 is about 189.6405855452.

The spelling of 6820149 in words is "six million, eight hundred twenty thousand, one hundred forty-nine".