3960509 has 4 divisors (see below), whose sum is σ = 4526304. Its totient is φ = 3394716.

The previous prime is 3960499. The next prime is 3960521. The reversal of 3960509 is 9050693.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 9050693 = 557 ⋅16249.

It is a cyclic number.

It is not a de Polignac number, because 3960509 - 2¹⁶ = 3894973 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 (3960599) 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, 282887 + ... + 282900.

It is an arithmetic number, because the mean of its divisors is an integer number (1131576).

Almost surely, 2^3960509 is an apocalyptic number.

It is an amenable number.

3960509 is a deficient number, since it is larger than the sum of its proper divisors (565795).

3960509 is an equidigital number, since it uses as much as digits as its factorization.

3960509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 565794.

The product of its (nonzero) digits is 7290, while the sum is 32.

The square root of 3960509 is about 1990.1027611659. The cubic root of 3960509 is about 158.2159760706.

The spelling of 3960509 in words is "three million, nine hundred sixty thousand, five hundred nine".