10097209 has 4 divisors (see below), whose sum is σ = 10105060. Its totient is φ = 10089360.

The previous prime is 10097203. The next prime is 10097221. The reversal of 10097209 is 90279001.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 6487209 + 3610000 = 2547^2 + 1900^2 .

It is a cyclic number.

It is not a de Polignac number, because 10097209 - 2⁷ = 10097081 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (10097203) 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, 1494 + ... + 4735.

It is an arithmetic number, because the mean of its divisors is an integer number (2526265).

Almost surely, 2^10097209 is an apocalyptic number.

It is an amenable number.

10097209 is a deficient number, since it is larger than the sum of its proper divisors (7851).

10097209 is an equidigital number, since it uses as much as digits as its factorization.

10097209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7850.

The product of its (nonzero) digits is 1134, while the sum is 28.

The square root of 10097209 is about 3177.6105802946. The cubic root of 10097209 is about 216.1393205552.

The spelling of 10097209 in words is "ten million, ninety-seven thousand, two hundred nine".