8961555 has 8 divisors (see below), whose sum is σ = 14338512. Its totient is φ = 4779488.

The previous prime is 8961527. The next prime is 8961583. The reversal of 8961555 is 5551698.

It is an interprime number because it is at equal distance from previous prime (8961527) and next prime (8961583).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 8961555 - 2⁸ = 8961299 is a prime.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 298704 + ... + 298733.

It is an arithmetic number, because the mean of its divisors is an integer number (1792314).

Almost surely, 2^8961555 is an apocalyptic number.

8961555 is a deficient number, since it is larger than the sum of its proper divisors (5376957).

8961555 is a wasteful number, since it uses less digits than its factorization.

8961555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 597445.

The product of its digits is 54000, while the sum is 39.

The square root of 8961555 is about 2993.5856426700. The cubic root of 8961555 is about 207.7117787486.

The spelling of 8961555 in words is "eight million, nine hundred sixty-one thousand, five hundred fifty-five".