43906013 has 16 divisors (see below), whose sum is σ = 47132160. Its totient is φ = 40824000.

The previous prime is 43906007. The next prime is 43906021. The reversal of 43906013 is 31060934.

It is a cyclic number.

It is not a de Polignac number, because 43906013 - 2⁴ = 43905997 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 (43906003) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 115658 + ... + 116036.

It is an arithmetic number, because the mean of its divisors is an integer number (2945760).

Almost surely, 2^43906013 is an apocalyptic number.

It is an amenable number.

43906013 is a deficient number, since it is larger than the sum of its proper divisors (3226147).

43906013 is a wasteful number, since it uses less digits than its factorization.

43906013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 548.

The product of its (nonzero) digits is 1944, while the sum is 26.

The square root of 43906013 is about 6626.1612567157. The cubic root of 43906013 is about 352.7832855146.

Adding to 43906013 its reverse (31060934), we get a palindrome (74966947).

The spelling of 43906013 in words is "forty-three million, nine hundred six thousand, thirteen".