992817081 has 27 divisors (see below), whose sum is σ = 1492987951. Its totient is φ = 660176568.

The previous prime is 992817061. The next prime is 992817083. The reversal of 992817081 is 180718299.

The square root of 992817081 is 31509.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 234365481 + 758451600 = 15309^2 + 27540^2 .

It is a tau number, because it is divible by the number of its divisors (27).

It is not a de Polignac number, because 992817081 - 2⁹ = 992816569 is a prime.

It is a super-3 number, since 3×992817081³ (a number of 28 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (992817083) 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 26 ways as a sum of consecutive naturals, for example, 2552035 + ... + 2552423.

Almost surely, 2^992817081 is an apocalyptic number.

992817081 is the 31509-th square number.

992817081 is the 15755-th centered octagonal number.

It is an amenable number.

992817081 is a deficient number, since it is larger than the sum of its proper divisors (500170870).

992817081 is an frugal number, since it uses more digits than its factorization.

992817081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 802 (or 392 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 45.

The cubic root of 992817081 is about 997.5999379773.

The spelling of 992817081 in words is "nine hundred ninety-two million, eight hundred seventeen thousand, eighty-one".