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6857969 is a prime number
BaseRepresentation
bin11010001010010011110001
3110220102100212
4122022103301
53223423334
6402553505
7112202036
oct32122361
913812325
106857969
113964548
122368895
131561691
14ca738d
15906ece
hex68a4f1

6857969 has 2 divisors, whose sum is σ = 6857970. Its totient is φ = 6857968.

The previous prime is 6857959. The next prime is 6857971. The reversal of 6857969 is 9697586.

6857969 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6760000 + 97969 = 2600^2 + 313^2 .

It is a cyclic number.

It is not a de Polignac number, because 6857969 - 28 = 6857713 is a prime.

It is a super-2 number, since 2×68579692 = 94063477609922, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 6857971, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (6857959) 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, 3428984 + 3428985.

It is an arithmetic number, because the mean of its divisors is an integer number (3428985).

Almost surely, 26857969 is an apocalyptic number.

It is an amenable number.

6857969 is a deficient number, since it is larger than the sum of its proper divisors (1).

6857969 is an equidigital number, since it uses as much as digits as its factorization.

6857969 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 816480, while the sum is 50.

The square root of 6857969 is about 2618.7724223384. The cubic root of 6857969 is about 189.9904796707.

The spelling of 6857969 in words is "six million, eight hundred fifty-seven thousand, nine hundred sixty-nine".