43664089 has 16 divisors (see below), whose sum is σ = 51757056. Its totient is φ = 36046800.

The previous prime is 43664063. The next prime is 43664099. The reversal of 43664089 is 98046634.

It is not a de Polignac number, because 43664089 - 2¹³ = 43655897 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (43664009) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 67164 + ... + 67810.

It is an arithmetic number, because the mean of its divisors is an integer number (3234816).

Almost surely, 2^43664089 is an apocalyptic number.

It is an amenable number.

43664089 is a deficient number, since it is larger than the sum of its proper divisors (8092967).

43664089 is a wasteful number, since it uses less digits than its factorization.

43664089 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 996.

The product of its (nonzero) digits is 124416, while the sum is 40.

The square root of 43664089 is about 6607.8808251965. The cubic root of 43664089 is about 352.1341414751.

The spelling of 43664089 in words is "forty-three million, six hundred sixty-four thousand, eighty-nine".