3879649 has 4 divisors (see below), whose sum is σ = 4013460. Its totient is φ = 3745840.

The previous prime is 3879641. The next prime is 3879671. The reversal of 3879649 is 9469783.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9469783 = 673 ⋅14071.

It can be written as a sum of positive squares in 2 ways, for example, as 2739025 + 1140624 = 1655^2 + 1068^2 .

It is a cyclic number.

It is not a de Polignac number, because 3879649 - 2³ = 3879641 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3879599 and 3879608.

It is not an unprimeable number, because it can be changed into a prime (3879641) 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, 66862 + ... + 66919.

It is an arithmetic number, because the mean of its divisors is an integer number (1003365).

Almost surely, 2^3879649 is an apocalyptic number.

It is an amenable number.

3879649 is a deficient number, since it is larger than the sum of its proper divisors (133811).

3879649 is a wasteful number, since it uses less digits than its factorization.

3879649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133810.

The product of its digits is 326592, while the sum is 46.

The square root of 3879649 is about 1969.6824617181. The cubic root of 3879649 is about 157.1318216178.

The spelling of 3879649 in words is "three million, eight hundred seventy-nine thousand, six hundred forty-nine".