3613909 has 4 divisors (see below), whose sum is σ = 3891916. Its totient is φ = 3335904.

The previous prime is 3613889. The next prime is 3613931. The reversal of 3613909 is 9093163.

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

It can be written as a sum of positive squares in 2 ways, for example, as 202500 + 3411409 = 450^2 + 1847^2 .

It is not a de Polignac number, because 3613909 - 2⁹ = 3613397 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 (3613999) 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, 138984 + ... + 139009.

It is an arithmetic number, because the mean of its divisors is an integer number (972979).

Almost surely, 2^3613909 is an apocalyptic number.

It is an amenable number.

3613909 is a deficient number, since it is larger than the sum of its proper divisors (278007).

3613909 is a wasteful number, since it uses less digits than its factorization.

3613909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 278006.

The product of its (nonzero) digits is 4374, while the sum is 31.

The square root of 3613909 is about 1901.0284058898. The cubic root of 3613909 is about 153.4590142637.

The spelling of 3613909 in words is "three million, six hundred thirteen thousand, nine hundred nine".