43850861 has 2 divisors, whose sum is σ = 43850862. Its totient is φ = 43850860.

The previous prime is 43850843. The next prime is 43850869. The reversal of 43850861 is 16805834.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 34880836 + 8970025 = 5906^2 + 2995^2 .

It is a cyclic number.

It is not a de Polignac number, because 43850861 - 2⁶ = 43850797 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43850869) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21925430 + 21925431.

It is an arithmetic number, because the mean of its divisors is an integer number (21925431).

Almost surely, 2^43850861 is an apocalyptic number.

It is an amenable number.

43850861 is a deficient number, since it is larger than the sum of its proper divisors (1).

43850861 is an equidigital number, since it uses as much as digits as its factorization.

43850861 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 23040, while the sum is 35.

The square root of 43850861 is about 6621.9982633643. The cubic root of 43850861 is about 352.6355088215.

The spelling of 43850861 in words is "forty-three million, eight hundred fifty thousand, eight hundred sixty-one".