3636005 has 4 divisors (see below), whose sum is σ = 4363212. Its totient is φ = 2908800.

The previous prime is 3635999. The next prime is 3636013. The reversal of 3636005 is 5006363.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5006363 = 139 ⋅36017.

It can be written as a sum of positive squares in 2 ways, for example, as 2617924 + 1018081 = 1618^2 + 1009^2 .

It is not a de Polignac number, because 3636005 - 2¹⁸ = 3373861 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 363596 + ... + 363605.

It is an arithmetic number, because the mean of its divisors is an integer number (1090803).

Almost surely, 2^3636005 is an apocalyptic number.

It is an amenable number.

3636005 is a deficient number, since it is larger than the sum of its proper divisors (727207).

3636005 is an equidigital number, since it uses as much as digits as its factorization.

3636005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 727206.

The product of its (nonzero) digits is 1620, while the sum is 23.

The square root of 3636005 is about 1906.8311409246. The cubic root of 3636005 is about 153.7711364072.

The spelling of 3636005 in words is "three million, six hundred thirty-six thousand, five".