43539945 has 8 divisors (see below), whose sum is σ = 69663936. Its totient is φ = 23221296.

The previous prime is 43539931. The next prime is 43539949. The reversal of 43539945 is 54993534.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 43539945 - 2¹³ = 43531753 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 43539897 and 43539906.

It is not an unprimeable number, because it can be changed into a prime (43539949) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1451317 + ... + 1451346.

It is an arithmetic number, because the mean of its divisors is an integer number (8707992).

Almost surely, 2^43539945 is an apocalyptic number.

It is an amenable number.

43539945 is a deficient number, since it is larger than the sum of its proper divisors (26123991).

43539945 is a wasteful number, since it uses less digits than its factorization.

43539945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2902671.

The product of its digits is 291600, while the sum is 42.

The square root of 43539945 is about 6598.4805069046. The cubic root of 43539945 is about 351.8001001051.

The spelling of 43539945 in words is "forty-three million, five hundred thirty-nine thousand, nine hundred forty-five".