6998909 has 2 divisors, whose sum is σ = 6998910. Its totient is φ = 6998908.

The previous prime is 6998869. The next prime is 6998921. The reversal of 6998909 is 9098996.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5428900 + 1570009 = 2330^2 + 1253^2 .

It is a cyclic number.

It is not a de Polignac number, because 6998909 - 2²⁰ = 5950333 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6998939) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3499454 + 3499455.

It is an arithmetic number, because the mean of its divisors is an integer number (3499455).

Almost surely, 2^6998909 is an apocalyptic number.

It is an amenable number.

6998909 is a deficient number, since it is larger than the sum of its proper divisors (1).

6998909 is an equidigital number, since it uses as much as digits as its factorization.

6998909 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 314928, while the sum is 50.

The square root of 6998909 is about 2645.5451234103. The cubic root of 6998909 is about 191.2831796279.

The spelling of 6998909 in words is "six million, nine hundred ninety-eight thousand, nine hundred nine".