43391113 has 4 divisors (see below), whose sum is σ = 43514388. Its totient is φ = 43267840.

The previous prime is 43391111. The next prime is 43391129. The reversal of 43391113 is 31119334.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 31119334 = 2 ⋅15559667.

It can be written as a sum of positive squares in 2 ways, for example, as 9437184 + 33953929 = 3072^2 + 5827^2 .

It is a cyclic number.

It is not a de Polignac number, because 43391113 - 2¹ = 43391111 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (43391111) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 61108 + ... + 61813.

It is an arithmetic number, because the mean of its divisors is an integer number (10878597).

Almost surely, 2^43391113 is an apocalyptic number.

It is an amenable number.

43391113 is a deficient number, since it is larger than the sum of its proper divisors (123275).

43391113 is a wasteful number, since it uses less digits than its factorization.

43391113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123274.

The product of its digits is 972, while the sum is 25.

The square root of 43391113 is about 6587.1931048057. The cubic root of 43391113 is about 351.3987913335.

The spelling of 43391113 in words is "forty-three million, three hundred ninety-one thousand, one hundred thirteen".