3879909 has 12 divisors (see below), whose sum is σ = 6113952. Its totient is φ = 2351400.

The previous prime is 3879853. The next prime is 3879913. The reversal of 3879909 is 9099783.

It is a happy number.

It is not a de Polignac number, because 3879909 - 2⁹ = 3879397 is a prime.

3879909 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3879919) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 19497 + ... + 19694.

It is an arithmetic number, because the mean of its divisors is an integer number (509496).

Almost surely, 2^3879909 is an apocalyptic number.

It is an amenable number.

3879909 is a deficient number, since it is larger than the sum of its proper divisors (2234043).

3879909 is a wasteful number, since it uses less digits than its factorization.

3879909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39208 (or 39205 counting only the distinct ones).

The product of its (nonzero) digits is 122472, while the sum is 45.

The square root of 3879909 is about 1969.7484610985. The cubic root of 3879909 is about 157.1353316742.

It can be divided in two parts, 387 and 9909, that added together give a triangular number (10296 = T₁₄₃).

The spelling of 3879909 in words is "three million, eight hundred seventy-nine thousand, nine hundred nine".