8961857 has 4 divisors (see below), whose sum is σ = 8968836. Its totient is φ = 8954880.

The previous prime is 8961851. The next prime is 8961859. The reversal of 8961857 is 7581698.

It is a happy number.

8961857 is nontrivially palindromic in base 6.

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 5271616 + 3690241 = 2296^2 + 1921^2 .

It is a cyclic number.

It is not a de Polignac number, because 8961857 - 2⁶ = 8961793 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 (8961851) 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 3 ways as a sum of consecutive naturals, for example, 944 + ... + 4337.

It is an arithmetic number, because the mean of its divisors is an integer number (2242209).

Almost surely, 2^8961857 is an apocalyptic number.

It is an amenable number.

8961857 is a deficient number, since it is larger than the sum of its proper divisors (6979).

8961857 is a wasteful number, since it uses less digits than its factorization.

8961857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6978.

The product of its digits is 120960, while the sum is 44.

The square root of 8961857 is about 2993.6360834276. The cubic root of 8961857 is about 207.7141119840.

The spelling of 8961857 in words is "eight million, nine hundred sixty-one thousand, eight hundred fifty-seven".