4001309 has 8 divisors (see below), whose sum is σ = 4330872. Its totient is φ = 3674880.

The previous prime is 4001303. The next prime is 4001339. The reversal of 4001309 is 9031004.

It can be written as a sum of positive squares in 4 ways, for example, as 334084 + 3667225 = 578^2 + 1915^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4001309 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4001303) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2369 + ... + 3689.

It is an arithmetic number, because the mean of its divisors is an integer number (541359).

Almost surely, 2^4001309 is an apocalyptic number.

It is an amenable number.

4001309 is a deficient number, since it is larger than the sum of its proper divisors (329563).

4001309 is a wasteful number, since it uses less digits than its factorization.

4001309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1567.

The product of its (nonzero) digits is 108, while the sum is 17.

The square root of 4001309 is about 2000.3272232312. The cubic root of 4001309 is about 158.7574192081.

The spelling of 4001309 in words is "four million, one thousand, three hundred nine".