3995309 has 4 divisors (see below), whose sum is σ = 4021920. Its totient is φ = 3968700.

The previous prime is 3995281. The next prime is 3995347. The reversal of 3995309 is 9035993.

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.

It is a cyclic number.

It is not a de Polignac number, because 3995309 - 2¹⁶ = 3929773 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 (3995609) 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, 13079 + ... + 13380.

It is an arithmetic number, because the mean of its divisors is an integer number (1005480).

Almost surely, 2^3995309 is an apocalyptic number.

It is an amenable number.

3995309 is a deficient number, since it is larger than the sum of its proper divisors (26611).

3995309 is a wasteful number, since it uses less digits than its factorization.

3995309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26610.

The product of its (nonzero) digits is 32805, while the sum is 38.

The square root of 3995309 is about 1998.8269059626. The cubic root of 3995309 is about 158.6780267702.

The spelling of 3995309 in words is "three million, nine hundred ninety-five thousand, three hundred nine".