1368817517 has 2 divisors, whose sum is σ = 1368817518. Its totient is φ = 1368817516.

The previous prime is 1368817511. The next prime is 1368817579. The reversal of 1368817517 is 7157188631.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1095212836 + 273604681 = 33094^2 + 16541^2 .

It is a cyclic number.

It is not a de Polignac number, because 1368817517 - 2⁶ = 1368817453 is a prime.

It is a super-2 number, since 2×1368817517² = 3747322789692090578, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1368817511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 684408758 + 684408759.

It is an arithmetic number, because the mean of its divisors is an integer number (684408759).

Almost surely, 2^1368817517 is an apocalyptic number.

It is an amenable number.

1368817517 is a deficient number, since it is larger than the sum of its proper divisors (1).

1368817517 is an equidigital number, since it uses as much as digits as its factorization.

1368817517 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 282240, while the sum is 47.

The square root of 1368817517 is about 36997.5339313312. The cubic root of 1368817517 is about 1110.3209084858.

The spelling of 1368817517 in words is "one billion, three hundred sixty-eight million, eight hundred seventeen thousand, five hundred seventeen".