8943661 has 4 divisors (see below), whose sum is σ = 9414400. Its totient is φ = 8472924.

The previous prime is 8943653. The next prime is 8943667. The reversal of 8943661 is 1663498.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 8943661 - 2³ = 8943653 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 8943661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8943667) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 235341 + ... + 235378.

It is an arithmetic number, because the mean of its divisors is an integer number (2353600).

Almost surely, 2^8943661 is an apocalyptic number.

It is an amenable number.

8943661 is a deficient number, since it is larger than the sum of its proper divisors (470739).

8943661 is a wasteful number, since it uses less digits than its factorization.

8943661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 470738.

The product of its digits is 31104, while the sum is 37.

The square root of 8943661 is about 2990.5954256636. The cubic root of 8943661 is about 207.5734370153.

It can be divided in two parts, 8943 and 661, that added together give a square (9604 = 98²).

The spelling of 8943661 in words is "eight million, nine hundred forty-three thousand, six hundred sixty-one".