8709961 has 16 divisors (see below), whose sum is σ = 9979200. Its totient is φ = 7535808.

The previous prime is 8709959. The next prime is 8709971. The reversal of 8709961 is 1699078.

It is a cyclic number.

It is not a de Polignac number, because 8709961 - 2¹ = 8709959 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8709931) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 44115 + ... + 44311.

It is an arithmetic number, because the mean of its divisors is an integer number (623700).

Almost surely, 2^8709961 is an apocalyptic number.

It is an amenable number.

8709961 is a deficient number, since it is larger than the sum of its proper divisors (1269239).

8709961 is a wasteful number, since it uses less digits than its factorization.

8709961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 408.

The product of its (nonzero) digits is 27216, while the sum is 40.

The square root of 8709961 is about 2951.2643053444. The cubic root of 8709961 is about 205.7494755120.

The spelling of 8709961 in words is "eight million, seven hundred nine thousand, nine hundred sixty-one".