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996981 = 32314449
BaseRepresentation
bin11110011011001110101
31212122121020
43303121311
5223400411
633211353
711321436
oct3633165
91778536
10996981
11621057
12400b59
1328ba3b
141bd48d
1514a606
hexf3675

996981 has 8 divisors (see below), whose sum is σ = 1387200. Its totient is φ = 635712.

The previous prime is 996979. The next prime is 997001. The reversal of 996981 is 189699.

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

It is not a de Polignac number, because 996981 - 21 = 996979 is a prime.

It is a super-2 number, since 2×9969812 = 1987942228722, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (996781) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7156 + ... + 7293.

It is an arithmetic number, because the mean of its divisors is an integer number (173400).

2996981 is an apocalyptic number.

996981 is the 632-nd centered pentagonal number.

It is an amenable number.

996981 is a deficient number, since it is larger than the sum of its proper divisors (390219).

996981 is a wasteful number, since it uses less digits than its factorization.

996981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14475.

The product of its digits is 34992, while the sum is 42.

The square root of 996981 is about 998.4893589819. The cubic root of 996981 is about 99.8992652258.

It can be divided in two parts, 99698 and 1, that added together give a palindrome (99699).

The spelling of 996981 in words is "nine hundred ninety-six thousand, nine hundred eighty-one".

Divisors: 1 3 23 69 14449 43347 332327 996981