996989859 has 12 divisors (see below), whose sum is σ = 1443692952. Its totient is φ = 663000000.

The previous prime is 996989813. The next prime is 996989867. The reversal of 996989859 is 958989699.

It is not a de Polignac number, because 996989859 - 2¹⁹ = 996465571 is a prime.

It is not an unprimeable number, because it can be changed into a prime (996989879) 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 11 ways as a sum of consecutive naturals, for example, 134517 + ... + 141734.

It is an arithmetic number, because the mean of its divisors is an integer number (120307746).

Almost surely, 2^996989859 is an apocalyptic number.

996989859 is a deficient number, since it is larger than the sum of its proper divisors (446703093).

996989859 is a wasteful number, since it uses less digits than its factorization.

996989859 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 276658 (or 276655 counting only the distinct ones).

The product of its digits is 113374080, while the sum is 72.

The square root of 996989859 is about 31575.1462229393. The cubic root of 996989859 is about 998.9956112076.

The spelling of 996989859 in words is "nine hundred ninety-six million, nine hundred eighty-nine thousand, eight hundred fifty-nine".