43607881 has 2 divisors, whose sum is σ = 43607882. Its totient is φ = 43607880.

The previous prime is 43607857. The next prime is 43607897. The reversal of 43607881 is 18870634.

It is a happy number.

43607881 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 can be written as a sum of positive squares in only one way, i.e., 42575625 + 1032256 = 6525^2 + 1016^2 .

It is a cyclic number.

It is not a de Polignac number, because 43607881 - 2¹⁷ = 43476809 is a prime.

It is a super-2 number, since 2×43607881² = 3803294570620322, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 43607881.

It is not a weakly prime, because it can be changed into another prime (43607281) 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, 21803940 + 21803941.

It is an arithmetic number, because the mean of its divisors is an integer number (21803941).

Almost surely, 2^43607881 is an apocalyptic number.

43607881 is the 4177-th centered pentagonal number.

It is an amenable number.

43607881 is a deficient number, since it is larger than the sum of its proper divisors (1).

43607881 is an equidigital number, since it uses as much as digits as its factorization.

43607881 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 32256, while the sum is 37.

The square root of 43607881 is about 6603.6263522401. The cubic root of 43607881 is about 351.9829779346.

The spelling of 43607881 in words is "forty-three million, six hundred seven thousand, eight hundred eighty-one".