3923509 has 4 divisors (see below), whose sum is σ = 3936204. Its totient is φ = 3910816.

The previous prime is 3923483. The next prime is 3923527. The reversal of 3923509 is 9053293.

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 324900 + 3598609 = 570^2 + 1897^2 .

It is a cyclic number.

It is not a de Polignac number, because 3923509 - 2⁵ = 3923477 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3923539) 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, 5872 + ... + 6505.

It is an arithmetic number, because the mean of its divisors is an integer number (984051).

Almost surely, 2^3923509 is an apocalyptic number.

It is an amenable number.

3923509 is a deficient number, since it is larger than the sum of its proper divisors (12695).

3923509 is a wasteful number, since it uses less digits than its factorization.

3923509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12694.

The product of its (nonzero) digits is 7290, while the sum is 31.

The square root of 3923509 is about 1980.7849454194. The cubic root of 3923509 is about 157.7217368952.

The spelling of 3923509 in words is "three million, nine hundred twenty-three thousand, five hundred nine".