43844861 has 2 divisors, whose sum is σ = 43844862. Its totient is φ = 43844860.

The previous prime is 43844851. The next prime is 43844863. The reversal of 43844861 is 16844834.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 39564100 + 4280761 = 6290^2 + 2069^2 .

It is a cyclic number.

It is not a de Polignac number, because 43844861 - 2²² = 39650557 is a prime.

It is a super-2 number, since 2×43844861² = 3844743672218642, which contains 22 as substring.

Together with 43844863, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43844863) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21922430 + 21922431.

It is an arithmetic number, because the mean of its divisors is an integer number (21922431).

Almost surely, 2^43844861 is an apocalyptic number.

It is an amenable number.

43844861 is a deficient number, since it is larger than the sum of its proper divisors (1).

43844861 is an equidigital number, since it uses as much as digits as its factorization.

43844861 is an evil number, because the sum of its binary digits is even.

The product of its digits is 73728, while the sum is 38.

The square root of 43844861 is about 6621.5452124108. The cubic root of 43844861 is about 352.6194246861.

The spelling of 43844861 in words is "forty-three million, eight hundred forty-four thousand, eight hundred sixty-one".