996681 has 16 divisors (see below), whose sum is σ = 1568768. Its totient is φ = 550800.

The previous prime is 996649. The next prime is 996689. The reversal of 996681 is 186699.

It is not a de Polignac number, because 996681 - 2⁵ = 996649 is a prime.

It is a super-2 number, since 2×996681² = 1986746031522, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (996689) 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 15 ways as a sum of consecutive naturals, for example, 115 + ... + 1416.

It is an arithmetic number, because the mean of its divisors is an integer number (98048).

2⁹⁹⁶⁶⁸¹ is an apocalyptic number.

It is an amenable number.

996681 is a deficient number, since it is larger than the sum of its proper divisors (572087).

996681 is a wasteful number, since it uses less digits than its factorization.

996681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1572.

The product of its digits is 23328, while the sum is 39.

The square root of 996681 is about 998.3391207400. The cubic root of 996681 is about 99.8892440431.

The spelling of 996681 in words is "nine hundred ninety-six thousand, six hundred eighty-one".