3690409 has 4 divisors (see below), whose sum is σ = 3710980. Its totient is φ = 3669840.

The previous prime is 3690397. The next prime is 3690437. The reversal of 3690409 is 9040963.

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 1651225 + 2039184 = 1285^2 + 1428^2 .

It is a cyclic number.

It is not a de Polignac number, because 3690409 - 2¹¹ = 3688361 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3690499) 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, 10014 + ... + 10375.

It is an arithmetic number, because the mean of its divisors is an integer number (927745).

Almost surely, 2^3690409 is an apocalyptic number.

It is an amenable number.

3690409 is a deficient number, since it is larger than the sum of its proper divisors (20571).

3690409 is a wasteful number, since it uses less digits than its factorization.

3690409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20570.

The product of its (nonzero) digits is 5832, while the sum is 31.

The square root of 3690409 is about 1921.0437267277. The cubic root of 3690409 is about 154.5342801924.

The spelling of 3690409 in words is "three million, six hundred ninety thousand, four hundred nine".