43466861 has 2 divisors, whose sum is σ = 43466862. Its totient is φ = 43466860.

The previous prime is 43466821. The next prime is 43466879. The reversal of 43466861 is 16866434.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 31866025 + 11600836 = 5645^2 + 3406^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-43466861 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43466821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21733430 + 21733431.

It is an arithmetic number, because the mean of its divisors is an integer number (21733431).

Almost surely, 2^43466861 is an apocalyptic number.

It is an amenable number.

43466861 is a deficient number, since it is larger than the sum of its proper divisors (1).

43466861 is an equidigital number, since it uses as much as digits as its factorization.

43466861 is an evil number, because the sum of its binary digits is even.

The product of its digits is 82944, while the sum is 38.

The square root of 43466861 is about 6592.9402393773. The cubic root of 43466861 is about 351.6031517805.

It can be divided in two parts, 43466 and 861, that multiplied together give a triangular number (37424226 = T₈₆₅₁).

The spelling of 43466861 in words is "forty-three million, four hundred sixty-six thousand, eight hundred sixty-one".