996337681 has 4 divisors (see below), whose sum is σ = 996407332. Its totient is φ = 996268032.

The previous prime is 996337627. The next prime is 996337697. The reversal of 996337681 is 186733699.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 186733699 = 229 ⋅815431.

It can be written as a sum of positive squares in 2 ways, for example, as 228161025 + 768176656 = 15105^2 + 27716^2 .

It is a cyclic number.

It is not a de Polignac number, because 996337681 - 2⁷ = 996337553 is a prime.

It is a super-2 number, since 2×996337681² = 1985377549160915522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (996337981) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4656 + ... + 44881.

It is an arithmetic number, because the mean of its divisors is an integer number (249101833).

Almost surely, 2^996337681 is an apocalyptic number.

It is an amenable number.

996337681 is a deficient number, since it is larger than the sum of its proper divisors (69651).

996337681 is a wasteful number, since it uses less digits than its factorization.

996337681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69650.

The product of its digits is 1469664, while the sum is 52.

The square root of 996337681 is about 31564.8171387068. The cubic root of 996337681 is about 998.7777336737. Note that the first 4 decimals are identical.

The spelling of 996337681 in words is "nine hundred ninety-six million, three hundred thirty-seven thousand, six hundred eighty-one".