43985101 has 2 divisors, whose sum is σ = 43985102. Its totient is φ = 43985100.

The previous prime is 43985099. The next prime is 43985111. The reversal of 43985101 is 10158934.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 43903876 + 81225 = 6626^2 + 285^2 .

It is a cyclic number.

It is not a de Polignac number, because 43985101 - 2¹ = 43985099 is a prime.

Together with 43985099, 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 (43985111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21992550 + 21992551.

It is an arithmetic number, because the mean of its divisors is an integer number (21992551).

Almost surely, 2^43985101 is an apocalyptic number.

It is an amenable number.

43985101 is a deficient number, since it is larger than the sum of its proper divisors (1).

43985101 is an equidigital number, since it uses as much as digits as its factorization.

43985101 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4320, while the sum is 31.

The square root of 43985101 is about 6632.1264312436. The cubic root of 43985101 is about 352.9949815645.

The spelling of 43985101 in words is "forty-three million, nine hundred eighty-five thousand, one hundred one".