43091687 has 2 divisors, whose sum is σ = 43091688. Its totient is φ = 43091686.

The previous prime is 43091623. The next prime is 43091707. The reversal of 43091687 is 78619034.

43091687 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 43091687 - 2⁶ = 43091623 is a prime.

It is a Chen prime.

It is a pancake number, because a pancake can be divided into 43091687 parts by 9283 straight cuts.

It is a self number, because there is not a number n which added to its sum of digits gives 43091687.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43091387) 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 as a sum of consecutive naturals, namely, 21545843 + 21545844.

It is an arithmetic number, because the mean of its divisors is an integer number (21545844).

Almost surely, 2^43091687 is an apocalyptic number.

43091687 is a deficient number, since it is larger than the sum of its proper divisors (1).

43091687 is an equidigital number, since it uses as much as digits as its factorization.

43091687 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36288, while the sum is 38.

The square root of 43091687 is about 6564.4258697924. The cubic root of 43091687 is about 350.5886339635.

The spelling of 43091687 in words is "forty-three million, ninety-one thousand, six hundred eighty-seven".