8959861 has 4 divisors (see below), whose sum is σ = 8967424. Its totient is φ = 8952300.

The previous prime is 8959829. The next prime is 8959879. The reversal of 8959861 is 1689598.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 8959861 - 2⁵ = 8959829 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 (8959891) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1575 + ... + 4516.

It is an arithmetic number, because the mean of its divisors is an integer number (2241856).

Almost surely, 2^8959861 is an apocalyptic number.

It is an amenable number.

8959861 is a deficient number, since it is larger than the sum of its proper divisors (7563).

8959861 is a wasteful number, since it uses less digits than its factorization.

8959861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7562.

The product of its digits is 155520, while the sum is 46.

The square root of 8959861 is about 2993.3026910087. The cubic root of 8959861 is about 207.6986900258.

The spelling of 8959861 in words is "eight million, nine hundred fifty-nine thousand, eight hundred sixty-one".