922981 has 4 divisors (see below), whose sum is σ = 977292. Its totient is φ = 868672.

The previous prime is 922973. The next prime is 922993. The reversal of 922981 is 189229.

922981 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 864900 + 58081 = 930^2 + 241^2 .

It is a cyclic number.

It is not a de Polignac number, because 922981 - 2³ = 922973 is a prime.

It is a super-2 number, since 2×922981² = 1703787852722, which contains 22 as substring.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (922931) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27130 + ... + 27163.

It is an arithmetic number, because the mean of its divisors is an integer number (244323).

2⁹²²⁹⁸¹ is an apocalyptic number.

It is an amenable number.

922981 is a deficient number, since it is larger than the sum of its proper divisors (54311).

922981 is a wasteful number, since it uses less digits than its factorization.

922981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54310.

The product of its digits is 2592, while the sum is 31.

The square root of 922981 is about 960.7190015816. The cubic root of 922981 is about 97.3638160087.

The spelling of 922981 in words is "nine hundred twenty-two thousand, nine hundred eighty-one".