2097509 has 8 divisors (see below), whose sum is σ = 2166720. Its totient is φ = 2029536.

The previous prime is 2097503. The next prime is 2097517. The reversal of 2097509 is 9057902.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2097509 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2097503) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4064 + ... + 4550.

It is an arithmetic number, because the mean of its divisors is an integer number (270840).

2^2097509 is an apocalyptic number.

It is an amenable number.

2097509 is a deficient number, since it is larger than the sum of its proper divisors (69211).

2097509 is an equidigital number, since it uses as much as digits as its factorization.

2097509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 619.

The product of its (nonzero) digits is 5670, while the sum is 32.

The square root of 2097509 is about 1448.2779429377. The cubic root of 2097509 is about 128.0072627715.

The spelling of 2097509 in words is "two million, ninety-seven thousand, five hundred nine".