43687625 has 16 divisors (see below), whose sum is σ = 54726672. Its totient is φ = 34819200.

The previous prime is 43687607. The next prime is 43687627. The reversal of 43687625 is 52678634.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 25120144 + 18567481 = 5012^2 + 4309^2 .

It is not a de Polignac number, because 43687625 - 2¹² = 43683529 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (43687627) 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, 46157 + ... + 47093.

It is an arithmetic number, because the mean of its divisors is an integer number (3420417).

Almost surely, 2^43687625 is an apocalyptic number.

It is an amenable number.

43687625 is a deficient number, since it is larger than the sum of its proper divisors (11039047).

43687625 is an equidigital number, since it uses as much as digits as its factorization.

43687625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1325 (or 1315 counting only the distinct ones).

The product of its digits is 241920, while the sum is 41.

The square root of 43687625 is about 6609.6614890628. The cubic root of 43687625 is about 352.1973997168.

The spelling of 43687625 in words is "forty-three million, six hundred eighty-seven thousand, six hundred twenty-five".