43947081 has 12 divisors (see below), whose sum is σ = 63747840. Its totient is φ = 29174040.

The previous prime is 43947077. The next prime is 43947097. The reversal of 43947081 is 18074934.

It is a happy number.

It is not a de Polignac number, because 43947081 - 2² = 43947077 is a prime.

It is a super-2 number, since 2×43947081² = 3862691856841122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (43947011) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8065 + ... + 12366.

It is an arithmetic number, because the mean of its divisors is an integer number (5312320).

Almost surely, 2^43947081 is an apocalyptic number.

It is an amenable number.

43947081 is a deficient number, since it is larger than the sum of its proper divisors (19800759).

43947081 is a wasteful number, since it uses less digits than its factorization.

43947081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20676 (or 20673 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 36.

The square root of 43947081 is about 6629.2594609051. The cubic root of 43947081 is about 352.8932445545.

The spelling of 43947081 in words is "forty-three million, nine hundred forty-seven thousand, eighty-one".