2036509 has 4 divisors (see below), whose sum is σ = 2041020. Its totient is φ = 2032000.

The previous prime is 2036501. The next prime is 2036513. The reversal of 2036509 is 9056302.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9056302 = 2 ⋅4528151.

It can be written as a sum of positive squares in 2 ways, for example, as 770884 + 1265625 = 878^2 + 1125^2 .

It is a cyclic number.

It is not a de Polignac number, because 2036509 - 2³ = 2036501 is a prime.

It is a Duffinian number.

2036509 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2036501) 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, 1492 + ... + 2509.

It is an arithmetic number, because the mean of its divisors is an integer number (510255).

2^2036509 is an apocalyptic number.

It is an amenable number.

2036509 is a deficient number, since it is larger than the sum of its proper divisors (4511).

2036509 is an equidigital number, since it uses as much as digits as its factorization.

2036509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4510.

The product of its (nonzero) digits is 1620, while the sum is 25.

The square root of 2036509 is about 1427.0630679826. The cubic root of 2036509 is about 126.7541278075.

It can be divided in two parts, 2036 and 509, that multiplied together give a square (1036324 = 1018²).

The spelling of 2036509 in words is "two million, thirty-six thousand, five hundred nine".