8945861 has 4 divisors (see below), whose sum is σ = 8952300. Its totient is φ = 8939424.

The previous prime is 8945851. The next prime is 8945869. The reversal of 8945861 is 1685498.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 5313025 + 3632836 = 2305^2 + 1906^2 .

It is a cyclic number.

It is not a de Polignac number, because 8945861 - 2²² = 4751557 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8945869) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 176 + ... + 4233.

It is an arithmetic number, because the mean of its divisors is an integer number (2238075).

Almost surely, 2^8945861 is an apocalyptic number.

It is an amenable number.

8945861 is a deficient number, since it is larger than the sum of its proper divisors (6439).

8945861 is a wasteful number, since it uses less digits than its factorization.

8945861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6438.

The product of its digits is 69120, while the sum is 41.

The square root of 8945861 is about 2990.9632227762. The cubic root of 8945861 is about 207.5904555540.

The spelling of 8945861 in words is "eight million, nine hundred forty-five thousand, eight hundred sixty-one".