3809939 has 4 divisors (see below), whose sum is σ = 4354224. Its totient is φ = 3265656.

The previous prime is 3809917. The next prime is 3809941. The reversal of 3809939 is 9399083.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3809939 is a prime.

It is a plaindrome in base 12.

It is a junction number, because it is equal to n+sod(n) for n = 3809896 and 3809905.

It is not an unprimeable number, because it can be changed into a prime (3809909) 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, 272132 + ... + 272145.

It is an arithmetic number, because the mean of its divisors is an integer number (1088556).

Almost surely, 2^3809939 is an apocalyptic number.

3809939 is a deficient number, since it is larger than the sum of its proper divisors (544285).

3809939 is an equidigital number, since it uses as much as digits as its factorization.

3809939 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 544284.

The product of its (nonzero) digits is 52488, while the sum is 41.

The square root of 3809939 is about 1951.9065039084. The cubic root of 3809939 is about 156.1850067827.

The spelling of 3809939 in words is "three million, eight hundred nine thousand, nine hundred thirty-nine".