4013943 has 4 divisors (see below), whose sum is σ = 5351928. Its totient is φ = 2675960.

The previous prime is 4013939. The next prime is 4013951. The reversal of 4013943 is 3493104.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 4013943 - 2² = 4013939 is a prime.

It is a super-2 number, since 2×4013943² = 32223476814498, which contains 22 as substring.

It is a D-number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4013953) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 668988 + ... + 668993.

It is an arithmetic number, because the mean of its divisors is an integer number (1337982).

Almost surely, 2^4013943 is an apocalyptic number.

4013943 is a deficient number, since it is larger than the sum of its proper divisors (1337985).

4013943 is a wasteful number, since it uses less digits than its factorization.

4013943 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1337984.

The product of its (nonzero) digits is 1296, while the sum is 24.

The square root of 4013943 is about 2003.4827176694. The cubic root of 4013943 is about 158.9243340776.

The spelling of 4013943 in words is "four million, thirteen thousand, nine hundred forty-three".