10997209 has 4 divisors (see below), whose sum is σ = 11010816. Its totient is φ = 10983604.

The previous prime is 10997171. The next prime is 10997213. The reversal of 10997209 is 90279901.

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 10997209 - 2⁷ = 10997081 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (10997279) 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, 5509 + ... + 7234.

It is an arithmetic number, because the mean of its divisors is an integer number (2752704).

Almost surely, 2^10997209 is an apocalyptic number.

It is an amenable number.

10997209 is a deficient number, since it is larger than the sum of its proper divisors (13607).

10997209 is an equidigital number, since it uses as much as digits as its factorization.

10997209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13606.

The product of its (nonzero) digits is 10206, while the sum is 37.

The square root of 10997209 is about 3316.2040045811. The cubic root of 10997209 is about 222.3791979858.

The spelling of 10997209 in words is "ten million, nine hundred ninety-seven thousand, two hundred nine".