43493689 has 4 divisors (see below), whose sum is σ = 43520656. Its totient is φ = 43466724.

The previous prime is 43493669. The next prime is 43493699. The reversal of 43493689 is 98639434.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 98639434 = 2 ⋅49319717.

It is a cyclic number.

It is not a de Polignac number, because 43493689 - 2¹⁹ = 42969401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (43493609) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10899 + ... + 14344.

It is an arithmetic number, because the mean of its divisors is an integer number (10880164).

Almost surely, 2^43493689 is an apocalyptic number.

It is an amenable number.

43493689 is a deficient number, since it is larger than the sum of its proper divisors (26967).

43493689 is a wasteful number, since it uses less digits than its factorization.

43493689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26966.

The product of its digits is 559872, while the sum is 46.

The square root of 43493689 is about 6594.9745261070. The cubic root of 43493689 is about 351.6754740749.

The spelling of 43493689 in words is "forty-three million, four hundred ninety-three thousand, six hundred eighty-nine".