822981 has 8 divisors (see below), whose sum is σ = 1101664. Its totient is φ = 546480.

The previous prime is 822973. The next prime is 822989. The reversal of 822981 is 189228.

822981 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (822973) and next prime (822989).

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

It is not a de Polignac number, because 822981 - 2³ = 822973 is a prime.

It is a super-2 number, since 2×822981² = 1354595452722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (822989) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 846 + ... + 1536.

It is an arithmetic number, because the mean of its divisors is an integer number (137708).

2⁸²²⁹⁸¹ is an apocalyptic number.

It is an amenable number.

822981 is a deficient number, since it is larger than the sum of its proper divisors (278683).

822981 is a wasteful number, since it uses less digits than its factorization.

822981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1091.

The product of its digits is 2304, while the sum is 30.

The square root of 822981 is about 907.1830024863. The cubic root of 822981 is about 93.7123012871.

It can be divided in two parts, 82 and 2981, that multiplied together give a palindrome (244442).

The spelling of 822981 in words is "eight hundred twenty-two thousand, nine hundred eighty-one".