3870609 has 4 divisors (see below), whose sum is σ = 5160816. Its totient is φ = 2580404.

The previous prime is 3870599. The next prime is 3870613. The reversal of 3870609 is 9060783.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 9060783 = 3 ⋅3020261.

It is a cyclic number.

It is not a de Polignac number, because 3870609 - 2²⁰ = 2822033 is a prime.

It is a super-2 number, since 2×3870609² = 29963228061762, which contains 22 as substring.

It is a D-number.

3870609 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 3870609.

It is not an unprimeable number, because it can be changed into a prime (3870619) 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, 645099 + ... + 645104.

It is an arithmetic number, because the mean of its divisors is an integer number (1290204).

Almost surely, 2^3870609 is an apocalyptic number.

It is an amenable number.

3870609 is a deficient number, since it is larger than the sum of its proper divisors (1290207).

3870609 is a wasteful number, since it uses less digits than its factorization.

3870609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1290206.

The product of its (nonzero) digits is 9072, while the sum is 33.

The square root of 3870609 is about 1967.3863372505. The cubic root of 3870609 is about 157.0096820134.

The spelling of 3870609 in words is "three million, eight hundred seventy thousand, six hundred nine".