1318207937 has 2 divisors, whose sum is σ = 1318207938. Its totient is φ = 1318207936.

The previous prime is 1318207921. The next prime is 1318208041. The reversal of 1318207937 is 7397028131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1305810496 + 12397441 = 36136^2 + 3521^2 .

It is an emirp because it is prime and its reverse (7397028131) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1318207937 - 2⁴ = 1318207921 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1318207894 and 1318207903.

It is not a weakly prime, because it can be changed into another prime (1318207907) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 659103968 + 659103969.

It is an arithmetic number, because the mean of its divisors is an integer number (659103969).

Almost surely, 2^1318207937 is an apocalyptic number.

It is an amenable number.

1318207937 is a deficient number, since it is larger than the sum of its proper divisors (1).

1318207937 is an equidigital number, since it uses as much as digits as its factorization.

1318207937 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 63504, while the sum is 41.

The square root of 1318207937 is about 36307.1334175531. The cubic root of 1318207937 is about 1096.4646655207.

The spelling of 1318207937 in words is "one billion, three hundred eighteen million, two hundred seven thousand, nine hundred thirty-seven".