3935509 has 2 divisors, whose sum is σ = 3935510. Its totient is φ = 3935508.

The previous prime is 3935501. The next prime is 3935521. The reversal of 3935509 is 9055393.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2965284 + 970225 = 1722^2 + 985^2 .

It is a cyclic number.

It is not a de Polignac number, because 3935509 - 2³ = 3935501 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3935501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1967754 + 1967755.

It is an arithmetic number, because the mean of its divisors is an integer number (1967755).

Almost surely, 2^3935509 is an apocalyptic number.

It is an amenable number.

3935509 is a deficient number, since it is larger than the sum of its proper divisors (1).

3935509 is an equidigital number, since it uses as much as digits as its factorization.

3935509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18225, while the sum is 34.

The square root of 3935509 is about 1983.8117350192. The cubic root of 3935509 is about 157.8823698521.

It can be divided in two parts, 3935 and 509, that added together give a palindrome (4444).

The spelling of 3935509 in words is "three million, nine hundred thirty-five thousand, five hundred nine".