996391 has 8 divisors (see below), whose sum is σ = 1094400. Its totient is φ = 899640.

The previous prime is 996367. The next prime is 996403. The reversal of 996391 is 193699.

996391 is an esthetic number in base 3, because in such base its adjacent digits differ by 1.

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

It is a cyclic number.

It is not a de Polignac number, because 996391 - 2⁷ = 996263 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 996391.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (996301) 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 7 ways as a sum of consecutive naturals, for example, 2440 + ... + 2818.

It is an arithmetic number, because the mean of its divisors is an integer number (136800).

2⁹⁹⁶³⁹¹ is an apocalyptic number.

996391 is a deficient number, since it is larger than the sum of its proper divisors (98009).

996391 is a wasteful number, since it uses less digits than its factorization.

996391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 629.

The product of its digits is 13122, while the sum is 37.

The square root of 996391 is about 998.1938689453. The cubic root of 996391 is about 99.8795549882.

The spelling of 996391 in words is "nine hundred ninety-six thousand, three hundred ninety-one".