6869909 has 2 divisors, whose sum is σ = 6869910. Its totient is φ = 6869908.

The previous prime is 6869869. The next prime is 6869927. The reversal of 6869909 is 9099686.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6838225 + 31684 = 2615^2 + 178^2 .

It is a cyclic number.

It is not a de Polignac number, because 6869909 - 2¹⁶ = 6804373 is a prime.

It is a super-4 number, since 4×6869909⁴ (a number of 28 digits) contains 4444 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6869959) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3434954 + 3434955.

It is an arithmetic number, because the mean of its divisors is an integer number (3434955).

Almost surely, 2^6869909 is an apocalyptic number.

It is an amenable number.

6869909 is a deficient number, since it is larger than the sum of its proper divisors (1).

6869909 is an equidigital number, since it uses as much as digits as its factorization.

6869909 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 209952, while the sum is 47.

The square root of 6869909 is about 2621.0511250260. The cubic root of 6869909 is about 190.1006761001.

The spelling of 6869909 in words is "six million, eight hundred sixty-nine thousand, nine hundred nine".