6997209 has 4 divisors (see below), whose sum is σ = 9329616. Its totient is φ = 4664804.

The previous prime is 6997201. The next prime is 6997213. The reversal of 6997209 is 9027996.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 6997209 - 2³ = 6997201 is a prime.

It is a D-number.

It is not an unprimeable number, because it can be changed into a prime (6997201) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1166199 + ... + 1166204.

It is an arithmetic number, because the mean of its divisors is an integer number (2332404).

Almost surely, 2^6997209 is an apocalyptic number.

It is an amenable number.

6997209 is a deficient number, since it is larger than the sum of its proper divisors (2332407).

6997209 is a wasteful number, since it uses less digits than its factorization.

6997209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2332406.

The product of its (nonzero) digits is 61236, while the sum is 42.

The square root of 6997209 is about 2645.2238090566. The cubic root of 6997209 is about 191.2676911312.

The spelling of 6997209 in words is "six million, nine hundred ninety-seven thousand, two hundred nine".