316981601 has 2 divisors, whose sum is σ = 316981602. Its totient is φ = 316981600.

The previous prime is 316981597. The next prime is 316981631. The reversal of 316981601 is 106189613.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 307090576 + 9891025 = 17524^2 + 3145^2 .

It is a cyclic number.

It is not a de Polignac number, because 316981601 - 2² = 316981597 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (316981631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 158490800 + 158490801.

It is an arithmetic number, because the mean of its divisors is an integer number (158490801).

Almost surely, 2^316981601 is an apocalyptic number.

It is an amenable number.

316981601 is a deficient number, since it is larger than the sum of its proper divisors (1).

316981601 is an equidigital number, since it uses as much as digits as its factorization.

316981601 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7776, while the sum is 35.

The square root of 316981601 is about 17803.9771118703. The cubic root of 316981601 is about 681.8330021996.

The spelling of 316981601 in words is "three hundred sixteen million, nine hundred eighty-one thousand, six hundred one".