43000661 has 8 divisors (see below), whose sum is σ = 47044800. Its totient is φ = 38979040.

The previous prime is 43000637. The next prime is 43000679. The reversal of 43000661 is 16600034.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-43000661 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43000621) 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, 1496 + ... + 9393.

It is an arithmetic number, because the mean of its divisors is an integer number (5880600).

Almost surely, 2^43000661 is an apocalyptic number.

It is an amenable number.

43000661 is a deficient number, since it is larger than the sum of its proper divisors (4044139).

43000661 is a wasteful number, since it uses less digits than its factorization.

43000661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11259.

The product of its (nonzero) digits is 432, while the sum is 20.

The square root of 43000661 is about 6557.4889248858. The cubic root of 43000661 is about 350.3416011815.

Adding to 43000661 its reverse (16600034), we get a palindrome (59600695).

The spelling of 43000661 in words is "forty-three million, six hundred sixty-one", and thus it is an aban number.