43923013 has 8 divisors (see below), whose sum is σ = 45503640. Its totient is φ = 42366720.

The previous prime is 43922999. The next prime is 43923029. The reversal of 43923013 is 31032934.

It is a happy number.

43923013 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 6749604 + 37173409 = 2598^2 + 6097^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 43923013 - 2²⁵ = 10368581 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 (43923413) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2370 + ... + 9667.

It is an arithmetic number, because the mean of its divisors is an integer number (5687955).

Almost surely, 2^43923013 is an apocalyptic number.

It is an amenable number.

43923013 is a deficient number, since it is larger than the sum of its proper divisors (1580627).

43923013 is a wasteful number, since it uses less digits than its factorization.

43923013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12167.

The product of its (nonzero) digits is 1944, while the sum is 25.

The square root of 43923013 is about 6627.4439265829. The cubic root of 43923013 is about 352.8288111087.

Adding to 43923013 its reverse (31032934), we get a palindrome (74955947).

The spelling of 43923013 in words is "forty-three million, nine hundred twenty-three thousand, thirteen".