2059509 has 4 divisors (see below), whose sum is σ = 2746016. Its totient is φ = 1373004.

The previous prime is 2059501. The next prime is 2059511. The reversal of 2059509 is 9059502.

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 not a de Polignac number, because 2059509 - 2³ = 2059501 is a prime.

It is a D-number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2059501) 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, 343249 + ... + 343254.

It is an arithmetic number, because the mean of its divisors is an integer number (686504).

2^2059509 is an apocalyptic number.

It is an amenable number.

2059509 is a deficient number, since it is larger than the sum of its proper divisors (686507).

2059509 is an equidigital number, since it uses as much as digits as its factorization.

2059509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 686506.

The product of its (nonzero) digits is 4050, while the sum is 30.

The square root of 2059509 is about 1435.0989512922. The cubic root of 2059509 is about 127.2295227348.

The spelling of 2059509 in words is "two million, fifty-nine thousand, five hundred nine".