1318087457 has 2 divisors, whose sum is σ = 1318087458. Its totient is φ = 1318087456.

The previous prime is 1318087447. The next prime is 1318087501. The reversal of 1318087457 is 7547808131.

It is an a-pointer prime, because the next prime (1318087501) can be obtained adding 1318087457 to its sum of digits (44).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 752075776 + 566011681 = 27424^2 + 23791^2 .

It is an emirp because it is prime and its reverse (7547808131) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1318087457 is a prime.

It is not a weakly prime, because it can be changed into another prime (1318087417) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 659043728 + 659043729.

It is an arithmetic number, because the mean of its divisors is an integer number (659043729).

Almost surely, 2^1318087457 is an apocalyptic number.

It is an amenable number.

1318087457 is a deficient number, since it is larger than the sum of its proper divisors (1).

1318087457 is an equidigital number, since it uses as much as digits as its factorization.

1318087457 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 188160, while the sum is 44.

The square root of 1318087457 is about 36305.4742015581. The cubic root of 1318087457 is about 1096.4312600455.

The spelling of 1318087457 in words is "one billion, three hundred eighteen million, eighty-seven thousand, four hundred fifty-seven".