43889101 has 2 divisors, whose sum is σ = 43889102. Its totient is φ = 43889100.

The previous prime is 43889099. The next prime is 43889113. The reversal of 43889101 is 10198834.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 43164900 + 724201 = 6570^2 + 851^2 .

It is a cyclic number.

It is not a de Polignac number, because 43889101 - 2¹ = 43889099 is a prime.

Together with 43889099, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43889201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21944550 + 21944551.

It is an arithmetic number, because the mean of its divisors is an integer number (21944551).

Almost surely, 2^43889101 is an apocalyptic number.

It is an amenable number.

43889101 is a deficient number, since it is larger than the sum of its proper divisors (1).

43889101 is an equidigital number, since it uses as much as digits as its factorization.

43889101 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6912, while the sum is 34.

The square root of 43889101 is about 6624.8849801336. The cubic root of 43889101 is about 352.7379839206.

The spelling of 43889101 in words is "forty-three million, eight hundred eighty-nine thousand, one hundred one".