43868161 has 2 divisors, whose sum is σ = 43868162. Its totient is φ = 43868160.

The previous prime is 43868141. The next prime is 43868171. The reversal of 43868161 is 16186834.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 39137536 + 4730625 = 6256^2 + 2175^2 .

It is a cyclic number.

It is not a de Polignac number, because 43868161 - 2¹¹ = 43866113 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 43868161.

It is not a weakly prime, because it can be changed into another prime (43868141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21934080 + 21934081.

It is an arithmetic number, because the mean of its divisors is an integer number (21934081).

It is a Proth number, since it is equal to 5355 ⋅ 2¹³ + 1 and 5355 < 2¹³.

Almost surely, 2^43868161 is an apocalyptic number.

It is an amenable number.

43868161 is a deficient number, since it is larger than the sum of its proper divisors (1).

43868161 is an equidigital number, since it uses as much as digits as its factorization.

43868161 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 27648, while the sum is 37.

The square root of 43868161 is about 6623.3043867846. The cubic root of 43868161 is about 352.6818765330.

The spelling of 43868161 in words is "forty-three million, eight hundred sixty-eight thousand, one hundred sixty-one".