996862821 has 8 divisors (see below), whose sum is σ = 1329801120. Its totient is φ = 664249872.

The previous prime is 996862787. The next prime is 996862859. The reversal of 996862821 is 128268699.

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

It is a de Polignac number, because none of the positive numbers 2^k-996862821 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (996862871) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 74095 + ... + 86508.

It is an arithmetic number, because the mean of its divisors is an integer number (166225140).

Almost surely, 2^996862821 is an apocalyptic number.

It is an amenable number.

996862821 is a deficient number, since it is larger than the sum of its proper divisors (332938299).

996862821 is a wasteful number, since it uses less digits than its factorization.

996862821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 162675.

The product of its digits is 746496, while the sum is 51.

The square root of 996862821 is about 31573.1344817077. The cubic root of 996862821 is about 998.9531782132.

The spelling of 996862821 in words is "nine hundred ninety-six million, eight hundred sixty-two thousand, eight hundred twenty-one".