422774981 has 2 divisors, whose sum is σ = 422774982. Its totient is φ = 422774980.

The previous prime is 422774881. The next prime is 422775019. The reversal of 422774981 is 189477224.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 373648900 + 49126081 = 19330^2 + 7009^2 .

It is a cyclic number.

It is not a de Polignac number, because 422774981 - 2¹⁴ = 422758597 is a prime.

It is a super-2 number, since 2×422774981² = 357477369119100722, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (422774081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 211387490 + 211387491.

It is an arithmetic number, because the mean of its divisors is an integer number (211387491).

Almost surely, 2^422774981 is an apocalyptic number.

It is an amenable number.

422774981 is a deficient number, since it is larger than the sum of its proper divisors (1).

422774981 is an equidigital number, since it uses as much as digits as its factorization.

422774981 is an evil number, because the sum of its binary digits is even.

The product of its digits is 225792, while the sum is 44.

The square root of 422774981 is about 20561.4926744145. The cubic root of 422774981 is about 750.5329432797.

The spelling of 422774981 in words is "four hundred twenty-two million, seven hundred seventy-four thousand, nine hundred eighty-one".