3647879 has 4 divisors (see below), whose sum is σ = 3685584. Its totient is φ = 3610176.

The previous prime is 3647873. The next prime is 3647921. The reversal of 3647879 is 9787463.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9787463 = 7 ⋅1398209.

It is a cyclic number.

It is not a de Polignac number, because 3647879 - 2¹⁶ = 3582343 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3647873) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18707 + ... + 18900.

It is an arithmetic number, because the mean of its divisors is an integer number (921396).

Almost surely, 2^3647879 is an apocalyptic number.

3647879 is a deficient number, since it is larger than the sum of its proper divisors (37705).

3647879 is an equidigital number, since it uses as much as digits as its factorization.

3647879 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37704.

The product of its digits is 254016, while the sum is 44.

The square root of 3647879 is about 1909.9421457206. The cubic root of 3647879 is about 153.9383432270.

The spelling of 3647879 in words is "three million, six hundred forty-seven thousand, eight hundred seventy-nine".