43445861 has 2 divisors, whose sum is σ = 43445862. Its totient is φ = 43445860.

The previous prime is 43445833. The next prime is 43445869. The reversal of 43445861 is 16854434.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22743361 + 20702500 = 4769^2 + 4550^2 .

It is a cyclic number.

It is not a de Polignac number, because 43445861 - 2⁶ = 43445797 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43445869) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21722930 + 21722931.

It is an arithmetic number, because the mean of its divisors is an integer number (21722931).

Almost surely, 2^43445861 is an apocalyptic number.

It is an amenable number.

43445861 is a deficient number, since it is larger than the sum of its proper divisors (1).

43445861 is an equidigital number, since it uses as much as digits as its factorization.

43445861 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 46080, while the sum is 35.

The square root of 43445861 is about 6591.3474343263. The cubic root of 43445861 is about 351.5465197056.

The spelling of 43445861 in words is "forty-three million, four hundred forty-five thousand, eight hundred sixty-one".