992881 has 4 divisors (see below), whose sum is σ = 1002100. Its totient is φ = 983664.

The previous prime is 992867. The next prime is 992891. The reversal of 992881 is 188299.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 378225 + 614656 = 615^2 + 784^2 .

It is a cyclic number.

It is not a de Polignac number, because 992881 - 2¹³ = 984689 is a prime.

It is a super-2 number, since 2×992881² = 1971625360322, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 992881.

It is not an unprimeable number, because it can be changed into a prime (992801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4446 + ... + 4663.

It is an arithmetic number, because the mean of its divisors is an integer number (250525).

2⁹⁹²⁸⁸¹ is an apocalyptic number.

It is an amenable number.

992881 is a deficient number, since it is larger than the sum of its proper divisors (9219).

992881 is a wasteful number, since it uses less digits than its factorization.

992881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9218.

The product of its digits is 10368, while the sum is 37.

The square root of 992881 is about 996.4341423295. The cubic root of 992881 is about 99.7621346494.

The spelling of 992881 in words is "nine hundred ninety-two thousand, eight hundred eighty-one".