43697 has 4 divisors (see below), whose sum is σ = 44916. Its totient is φ = 42480.

The previous prime is 43691. The next prime is 43711. The reversal of 43697 is 79634.

43697 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 39601 + 4096 = 199^2 + 64^2 .

It is a cyclic number.

It is not a de Polignac number, because 43697 - 2⁶ = 43633 is a prime.

It is a Duffinian number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 43697.

It is not an unprimeable number, because it can be changed into a prime (43691) 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, 554 + ... + 627.

It is an arithmetic number, because the mean of its divisors is an integer number (11229).

2⁴³⁶⁹⁷ is an apocalyptic number.

It is an amenable number.

43697 is a deficient number, since it is larger than the sum of its proper divisors (1219).

43697 is a wasteful number, since it uses less digits than its factorization.

43697 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1218.

The product of its digits is 4536, while the sum is 29.

The square root of 43697 is about 209.0382740074. The cubic root of 43697 is about 35.2222590790. Note that the first 4 decimals are identical.

Subtracting 43697 from its reverse (79634), we obtain a cube (35937 = 33³).

The spelling of 43697 in words is "forty-three thousand, six hundred ninety-seven".