39943013 has 8 divisors (see below), whose sum is σ = 46137600. Its totient is φ = 34175680.

The previous prime is 39942971. The next prime is 39943021. The reversal of 39943013 is 31034993.

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

It is not a de Polignac number, because 39943013 - 2¹⁰ = 39941989 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 (39943213) 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, 106613 + ... + 106986.

It is an arithmetic number, because the mean of its divisors is an integer number (5767200).

Almost surely, 2^39943013 is an apocalyptic number.

It is an amenable number.

39943013 is a deficient number, since it is larger than the sum of its proper divisors (6194587).

39943013 is a wasteful number, since it uses less digits than its factorization.

39943013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 213627.

The product of its (nonzero) digits is 8748, while the sum is 32.

The square root of 39943013 is about 6320.0484966494. The cubic root of 39943013 is about 341.8327014813.

It can be divided in two parts, 3994 and 3013, that added together give a palindrome (7007).

The spelling of 39943013 in words is "thirty-nine million, nine hundred forty-three thousand, thirteen".