8961815 has 8 divisors (see below), whose sum is σ = 10930848. Its totient is φ = 7051680.

The previous prime is 8961811. The next prime is 8961851. The reversal of 8961815 is 5181698.

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

It is not a de Polignac number, because 8961815 - 2² = 8961811 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 (8961811) 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 7 ways as a sum of consecutive naturals, for example, 14387 + ... + 14996.

It is an arithmetic number, because the mean of its divisors is an integer number (1366356).

Almost surely, 2^8961815 is an apocalyptic number.

8961815 is a deficient number, since it is larger than the sum of its proper divisors (1969033).

8961815 is a wasteful number, since it uses less digits than its factorization.

8961815 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29449.

The product of its digits is 17280, while the sum is 38.

The square root of 8961815 is about 2993.6290685387. The cubic root of 8961815 is about 207.7137874974.

The spelling of 8961815 in words is "eight million, nine hundred sixty-one thousand, eight hundred fifteen".