43887113 has 2 divisors, whose sum is σ = 43887114. Its totient is φ = 43887112.

The previous prime is 43887101. The next prime is 43887161. The reversal of 43887113 is 31178834.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 27175369 + 16711744 = 5213^2 + 4088^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-43887113 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (43887313) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21943556 + 21943557.

It is an arithmetic number, because the mean of its divisors is an integer number (21943557).

Almost surely, 2^43887113 is an apocalyptic number.

It is an amenable number.

43887113 is a deficient number, since it is larger than the sum of its proper divisors (1).

43887113 is an equidigital number, since it uses as much as digits as its factorization.

43887113 is an evil number, because the sum of its binary digits is even.

The product of its digits is 16128, while the sum is 35.

The square root of 43887113 is about 6624.7349380937. The cubic root of 43887113 is about 352.7326579688.

The spelling of 43887113 in words is "forty-three million, eight hundred eighty-seven thousand, one hundred thirteen".