995591 has 2 divisors, whose sum is σ = 995592. Its totient is φ = 995590.

The previous prime is 995587. The next prime is 995593. The reversal of 995591 is 195599.

995591 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is an emirp because it is prime and its reverse (195599) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 995591 - 2² = 995587 is a prime.

Together with 995593, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (995593) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 497795 + 497796.

It is an arithmetic number, because the mean of its divisors is an integer number (497796).

2⁹⁹⁵⁵⁹¹ is an apocalyptic number.

995591 is a deficient number, since it is larger than the sum of its proper divisors (1).

995591 is an equidigital number, since it uses as much as digits as its factorization.

995591 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18225, while the sum is 38.

The square root of 995591 is about 997.7930647183. The cubic root of 995591 is about 99.8528168107.

The spelling of 995591 in words is "nine hundred ninety-five thousand, five hundred ninety-one".