43186961 has 2 divisors, whose sum is σ = 43186962. Its totient is φ = 43186960.

The previous prime is 43186951. The next prime is 43187017. The reversal of 43186961 is 16968134.

43186961 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25806400 + 17380561 = 5080^2 + 4169^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-43186961 is a prime.

It is a super-2 number, since 2×43186961² = 3730227200831042, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (43186951) 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, 21593480 + 21593481.

It is an arithmetic number, because the mean of its divisors is an integer number (21593481).

Almost surely, 2^43186961 is an apocalyptic number.

It is an amenable number.

43186961 is a deficient number, since it is larger than the sum of its proper divisors (1).

43186961 is an equidigital number, since it uses as much as digits as its factorization.

43186961 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 31104, while the sum is 38.

The square root of 43186961 is about 6571.6787048668. The cubic root of 43186961 is about 350.8468229339.

The spelling of 43186961 in words is "forty-three million, one hundred eighty-six thousand, nine hundred sixty-one".