8509995 has 48 divisors (see below), whose sum is σ = 16426080. Its totient is φ = 4178304.

The previous prime is 8509987. The next prime is 8509999. The reversal of 8509995 is 5999058.

It is not a de Polignac number, because 8509995 - 2³ = 8509987 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 8509995.

It is not an unprimeable number, because it can be changed into a prime (8509999) 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 47 ways as a sum of consecutive naturals, for example, 22629 + ... + 23001.

It is an arithmetic number, because the mean of its divisors is an integer number (342210).

Almost surely, 2^8509995 is an apocalyptic number.

8509995 is a deficient number, since it is larger than the sum of its proper divisors (7916085).

8509995 is a wasteful number, since it uses less digits than its factorization.

8509995 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 413 (or 394 counting only the distinct ones).

The product of its (nonzero) digits is 145800, while the sum is 45.

The square root of 8509995 is about 2917.1895721739. The cubic root of 8509995 is about 204.1627161992.

The spelling of 8509995 in words is "eight million, five hundred nine thousand, nine hundred ninety-five".