43964489 has 2 divisors, whose sum is σ = 43964490. Its totient is φ = 43964488.

The previous prime is 43964483. The next prime is 43964491. The reversal of 43964489 is 98446934.

It is a happy number.

43964489 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 28440889 + 15523600 = 5333^2 + 3940^2 .

It is a cyclic number.

It is not a de Polignac number, because 43964489 - 2²⁰ = 42915913 is a prime.

It is a super-2 number, since 2×43964489² = 3865752586062242, which contains 22 as substring.

Together with 43964491, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (43964483) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21982244 + 21982245.

It is an arithmetic number, because the mean of its divisors is an integer number (21982245).

Almost surely, 2^43964489 is an apocalyptic number.

It is an amenable number.

43964489 is a deficient number, since it is larger than the sum of its proper divisors (1).

43964489 is an equidigital number, since it uses as much as digits as its factorization.

43964489 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 746496, while the sum is 47.

The square root of 43964489 is about 6630.5722980750. The cubic root of 43964489 is about 352.9398335771.

The spelling of 43964489 in words is "forty-three million, nine hundred sixty-four thousand, four hundred eighty-nine".