995531 has 2 divisors, whose sum is σ = 995532. Its totient is φ = 995530.

The previous prime is 995513. The next prime is 995539. The reversal of 995531 is 135599.

Together with previous prime (995513) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is an emirp because it is prime and its reverse (135599) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 995531 - 2¹⁸ = 733387 is a prime.

It is a super-2 number, since 2×995531² = 1982163943922, which contains 22 as substring.

It is a Sophie Germain prime.

It is a nialpdrome in base 10.

It is not a weakly prime, because it can be changed into another 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 as a sum of consecutive naturals, namely, 497765 + 497766.

It is an arithmetic number, because the mean of its divisors is an integer number (497766).

2⁹⁹⁵⁵³¹ is an apocalyptic number.

995531 is a deficient number, since it is larger than the sum of its proper divisors (1).

995531 is an equidigital number, since it uses as much as digits as its factorization.

995531 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6075, while the sum is 32.

The square root of 995531 is about 997.7629979108. The cubic root of 995531 is about 99.8508108701.

The spelling of 995531 in words is "nine hundred ninety-five thousand, five hundred thirty-one".