1312587517 has 2 divisors, whose sum is σ = 1312587518. Its totient is φ = 1312587516.

The previous prime is 1312587509. The next prime is 1312587541. The reversal of 1312587517 is 7157852131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1291252356 + 21335161 = 35934^2 + 4619^2 .

It is a cyclic number.

It is not a de Polignac number, because 1312587517 - 2³ = 1312587509 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1312587517.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1312587587) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 656293758 + 656293759.

It is an arithmetic number, because the mean of its divisors is an integer number (656293759).

Almost surely, 2^1312587517 is an apocalyptic number.

It is an amenable number.

1312587517 is a deficient number, since it is larger than the sum of its proper divisors (1).

1312587517 is an equidigital number, since it uses as much as digits as its factorization.

1312587517 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 58800, while the sum is 40.

The square root of 1312587517 is about 36229.6496946907. The cubic root of 1312587517 is about 1094.9041198201.

The spelling of 1312587517 in words is "one billion, three hundred twelve million, five hundred eighty-seven thousand, five hundred seventeen".