8961905 has 4 divisors (see below), whose sum is σ = 10754292. Its totient is φ = 7169520.

The previous prime is 8961893. The next prime is 8961943. The reversal of 8961905 is 5091698.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2155024 + 6806881 = 1468^2 + 2609^2 .

It is not a de Polignac number, because 8961905 - 2⁴ = 8961889 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

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, 896186 + ... + 896195.

It is an arithmetic number, because the mean of its divisors is an integer number (2688573).

Almost surely, 2^8961905 is an apocalyptic number.

It is an amenable number.

8961905 is a deficient number, since it is larger than the sum of its proper divisors (1792387).

8961905 is a wasteful number, since it uses less digits than its factorization.

8961905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1792386.

The product of its (nonzero) digits is 19440, while the sum is 38.

The square root of 8961905 is about 2993.6441004234. The cubic root of 8961905 is about 207.7144828245.

The spelling of 8961905 in words is "eight million, nine hundred sixty-one thousand, nine hundred five".