4013309 has 4 divisors (see below), whose sum is σ = 4249404. Its totient is φ = 3777216.

The previous prime is 4013297. The next prime is 4013323. The reversal of 4013309 is 9033104.

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 2044900 + 1968409 = 1430^2 + 1403^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4013309 is a prime.

It is a super-2 number, since 2×4013309² = 32213298258962, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4013329) 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, 118022 + ... + 118055.

It is an arithmetic number, because the mean of its divisors is an integer number (1062351).

Almost surely, 2^4013309 is an apocalyptic number.

It is an amenable number.

4013309 is a deficient number, since it is larger than the sum of its proper divisors (236095).

4013309 is a wasteful number, since it uses less digits than its factorization.

4013309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 236094.

The product of its (nonzero) digits is 324, while the sum is 20.

The square root of 4013309 is about 2003.3244869466. The cubic root of 4013309 is about 158.9159663012.

The spelling of 4013309 in words is "four million, thirteen thousand, three hundred nine".