3813639 has 4 divisors (see below), whose sum is σ = 5084856. Its totient is φ = 2542424.

The previous prime is 3813631. The next prime is 3813643. The reversal of 3813639 is 9363183.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 3813639 - 2³ = 3813631 is a prime.

It is a D-number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3813631) 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, 635604 + ... + 635609.

It is an arithmetic number, because the mean of its divisors is an integer number (1271214).

Almost surely, 2^3813639 is an apocalyptic number.

3813639 is a deficient number, since it is larger than the sum of its proper divisors (1271217).

3813639 is a wasteful number, since it uses less digits than its factorization.

3813639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1271216.

The product of its digits is 11664, while the sum is 33.

The square root of 3813639 is about 1952.8540652082. The cubic root of 3813639 is about 156.2355498103.

The spelling of 3813639 in words is "three million, eight hundred thirteen thousand, six hundred thirty-nine".