43534989 has 20 divisors (see below), whose sum is σ = 66625020. Its totient is φ = 28313280.

The previous prime is 43534987. The next prime is 43534991. The reversal of 43534989 is 98943534.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (43534987) and next prime (43534991).

It can be written as a sum of positive squares in 2 ways, for example, as 8037225 + 35497764 = 2835^2 + 5958^2 .

It is not a de Polignac number, because 43534989 - 2¹ = 43534987 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43534987) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 3234 + ... + 9875.

It is an arithmetic number, because the mean of its divisors is an integer number (3331251).

Almost surely, 2^43534989 is an apocalyptic number.

It is an amenable number.

43534989 is a deficient number, since it is larger than the sum of its proper divisors (23090031).

43534989 is a wasteful number, since it uses less digits than its factorization.

43534989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13162 (or 13153 counting only the distinct ones).

The product of its digits is 466560, while the sum is 45.

The square root of 43534989 is about 6598.1049552125. The cubic root of 43534989 is about 351.7867515394.

The spelling of 43534989 in words is "forty-three million, five hundred thirty-four thousand, nine hundred eighty-nine".