3636681 has 4 divisors (see below), whose sum is σ = 4848912. Its totient is φ = 2424452.

The previous prime is 3636667. The next prime is 3636683. The reversal of 3636681 is 1866363.

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 a cyclic number.

It is not a de Polignac number, because 3636681 - 2⁶ = 3636617 is a prime.

It is a super-2 number, since 2×3636681² = 26450897391522, which contains 22 as substring.

It is a D-number.

It is a Curzon number.

3636681 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (3636683) 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, 606111 + ... + 606116.

It is an arithmetic number, because the mean of its divisors is an integer number (1212228).

Almost surely, 2^3636681 is an apocalyptic number.

It is an amenable number.

3636681 is a deficient number, since it is larger than the sum of its proper divisors (1212231).

3636681 is a wasteful number, since it uses less digits than its factorization.

3636681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1212230.

The product of its digits is 15552, while the sum is 33.

The square root of 3636681 is about 1907.0083901231. The cubic root of 3636681 is about 153.7806654413.

The spelling of 3636681 in words is "three million, six hundred thirty-six thousand, six hundred eighty-one".