3601909 has 4 divisors (see below), whose sum is σ = 3813804. Its totient is φ = 3390016.

The previous prime is 3601903. The next prime is 3601931. The reversal of 3601909 is 9091063.

It is a happy number.

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 1898884 + 1703025 = 1378^2 + 1305^2 .

It is a cyclic number.

It is not a de Polignac number, because 3601909 - 2⁵ = 3601877 is a prime.

It is a Duffinian number.

3601909 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3601903) 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, 105922 + ... + 105955.

It is an arithmetic number, because the mean of its divisors is an integer number (953451).

Almost surely, 2^3601909 is an apocalyptic number.

It is an amenable number.

3601909 is a deficient number, since it is larger than the sum of its proper divisors (211895).

3601909 is a wasteful number, since it uses less digits than its factorization.

3601909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 211894.

The product of its (nonzero) digits is 1458, while the sum is 28.

The square root of 3601909 is about 1897.8695950987. The cubic root of 3601909 is about 153.2889721492.

The spelling of 3601909 in words is "three million, six hundred one thousand, nine hundred nine".