3869139 has 4 divisors (see below), whose sum is σ = 5158856. Its totient is φ = 2579424.

The previous prime is 3869123. The next prime is 3869153. The reversal of 3869139 is 9319683.

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

It is not a de Polignac number, because 3869139 - 2⁴ = 3869123 is a prime.

It is a D-number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3869097 and 3869106.

It is not an unprimeable number, because it can be changed into a prime (3869189) 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, 644854 + ... + 644859.

It is an arithmetic number, because the mean of its divisors is an integer number (1289714).

Almost surely, 2^3869139 is an apocalyptic number.

3869139 is a deficient number, since it is larger than the sum of its proper divisors (1289717).

3869139 is a wasteful number, since it uses less digits than its factorization.

3869139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1289716.

The product of its digits is 34992, while the sum is 39.

The square root of 3869139 is about 1967.0127096692. The cubic root of 3869139 is about 156.9898028456.

The spelling of 3869139 in words is "three million, eight hundred sixty-nine thousand, one hundred thirty-nine".