43673645 has 4 divisors (see below), whose sum is σ = 52408380. Its totient is φ = 34938912.

The previous prime is 43673639. The next prime is 43673657. The reversal of 43673645 is 54637634.

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 34316164 + 9357481 = 5858^2 + 3059^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-43673645 is a prime.

It is a super-3 number, since 3×43673645³ (a number of 24 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 43673599 and 43673608.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4367360 + ... + 4367369.

It is an arithmetic number, because the mean of its divisors is an integer number (13102095).

Almost surely, 2^43673645 is an apocalyptic number.

It is an amenable number.

43673645 is a deficient number, since it is larger than the sum of its proper divisors (8734735).

43673645 is an equidigital number, since it uses as much as digits as its factorization.

43673645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8734734.

The product of its digits is 181440, while the sum is 38.

The square root of 43673645 is about 6608.6038616337. The cubic root of 43673645 is about 352.1598280937.

The spelling of 43673645 in words is "forty-three million, six hundred seventy-three thousand, six hundred forty-five".