1318813877 has 2 divisors, whose sum is σ = 1318813878. Its totient is φ = 1318813876.

The previous prime is 1318813871. The next prime is 1318813891. The reversal of 1318813877 is 7783188131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 979001521 + 339812356 = 31289^2 + 18434^2 .

It is an emirp because it is prime and its reverse (7783188131) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1318813877 - 2⁴ = 1318813861 is a prime.

It is a super-2 number, since 2×1318813877² = 3478540084335542258, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1318813871) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 659406938 + 659406939.

It is an arithmetic number, because the mean of its divisors is an integer number (659406939).

Almost surely, 2^1318813877 is an apocalyptic number.

It is an amenable number.

1318813877 is a deficient number, since it is larger than the sum of its proper divisors (1).

1318813877 is an equidigital number, since it uses as much as digits as its factorization.

1318813877 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 225792, while the sum is 47.

The square root of 1318813877 is about 36315.4770999914. The cubic root of 1318813877 is about 1096.6326435780.

The spelling of 1318813877 in words is "one billion, three hundred eighteen million, eight hundred thirteen thousand, eight hundred seventy-seven".