3960009 has 10 divisors (see below), whose sum is σ = 5915690. Its totient is φ = 2639952.

The previous prime is 3960007. The next prime is 3960029. The reversal of 3960009 is 9000693.

It can be written as a sum of positive squares in only one way, i.e., 3504384 + 455625 = 1872^2 + 675^2 .

It is not a de Polignac number, because 3960009 - 2¹ = 3960007 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (3960007) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 24364 + ... + 24525.

It is an arithmetic number, because the mean of its divisors is an integer number (591569).

Almost surely, 2^3960009 is an apocalyptic number.

It is an amenable number.

3960009 is a deficient number, since it is larger than the sum of its proper divisors (1955681).

3960009 is an equidigital number, since it uses as much as digits as its factorization.

3960009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48901 (or 48892 counting only the distinct ones).

The product of its (nonzero) digits is 1458, while the sum is 27.

The square root of 3960009 is about 1989.9771355470. The cubic root of 3960009 is about 158.2093177247.

The spelling of 3960009 in words is "three million, nine hundred sixty thousand, nine".