316487081 has 2 divisors, whose sum is σ = 316487082. Its totient is φ = 316487080.

The previous prime is 316487069. The next prime is 316487117. The reversal of 316487081 is 180784613.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 251539600 + 64947481 = 15860^2 + 8059^2 .

It is a cyclic number.

It is not a de Polignac number, because 316487081 - 2¹⁰ = 316486057 is a prime.

It is a super-2 number, since 2×316487081² = 200328144879801122, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (316487021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 158243540 + 158243541.

It is an arithmetic number, because the mean of its divisors is an integer number (158243541).

Almost surely, 2^316487081 is an apocalyptic number.

It is an amenable number.

316487081 is a deficient number, since it is larger than the sum of its proper divisors (1).

316487081 is an equidigital number, since it uses as much as digits as its factorization.

316487081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32256, while the sum is 38.

The square root of 316487081 is about 17790.0837828269. The cubic root of 316487081 is about 681.4782439096.

The spelling of 316487081 in words is "three hundred sixteen million, four hundred eighty-seven thousand, eighty-one".