922742981 has 2 divisors, whose sum is σ = 922742982. Its totient is φ = 922742980.

The previous prime is 922742959. The next prime is 922743047. The reversal of 922742981 is 189247229.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 840478081 + 82264900 = 28991^2 + 9070^2 .

It is an emirp because it is prime and its reverse (189247229) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 922742981 - 2⁶ = 922742917 is a prime.

It is a super-2 number, since 2×922742981² = 1702909217969532722, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (922742081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 461371490 + 461371491.

It is an arithmetic number, because the mean of its divisors is an integer number (461371491).

Almost surely, 2^922742981 is an apocalyptic number.

It is an amenable number.

922742981 is a deficient number, since it is larger than the sum of its proper divisors (1).

922742981 is an equidigital number, since it uses as much as digits as its factorization.

922742981 is an evil number, because the sum of its binary digits is even.

The product of its digits is 145152, while the sum is 44.

The square root of 922742981 is about 30376.6848257014. The cubic root of 922742981 is about 973.5544587231.

The spelling of 922742981 in words is "nine hundred twenty-two million, seven hundred forty-two thousand, nine hundred eighty-one".