318274981 has 2 divisors, whose sum is σ = 318274982. Its totient is φ = 318274980.

The previous prime is 318274961. The next prime is 318275021. The reversal of 318274981 is 189472813.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 310957956 + 7317025 = 17634^2 + 2705^2 .

It is a cyclic number.

It is not a de Polignac number, because 318274981 - 2²⁵ = 284720549 is a prime.

It is a super-2 number, since 2×318274981² = 202597927061100722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (318274921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 159137490 + 159137491.

It is an arithmetic number, because the mean of its divisors is an integer number (159137491).

Almost surely, 2^318274981 is an apocalyptic number.

It is an amenable number.

318274981 is a deficient number, since it is larger than the sum of its proper divisors (1).

318274981 is an equidigital number, since it uses as much as digits as its factorization.

318274981 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 96768, while the sum is 43.

The square root of 318274981 is about 17840.2629184662. The cubic root of 318274981 is about 682.7591047945.

The spelling of 318274981 in words is "three hundred eighteen million, two hundred seventy-four thousand, nine hundred eighty-one".