995509 has 4 divisors (see below), whose sum is σ = 1038816. Its totient is φ = 952204.

The previous prime is 995471. The next prime is 995513. The reversal of 995509 is 905599.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 995509 - 2⁷ = 995381 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (995539) 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, 21619 + ... + 21664.

It is an arithmetic number, because the mean of its divisors is an integer number (259704).

2⁹⁹⁵⁵⁰⁹ is an apocalyptic number.

It is an amenable number.

995509 is a deficient number, since it is larger than the sum of its proper divisors (43307).

995509 is a wasteful number, since it uses less digits than its factorization.

995509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43306.

The product of its (nonzero) digits is 18225, while the sum is 37.

The square root of 995509 is about 997.7519731877. The cubic root of 995509 is about 99.8500753383.

The spelling of 995509 in words is "nine hundred ninety-five thousand, five hundred nine".