687363497099137 has 2 divisors, whose sum is σ = 687363497099138. Its totient is φ = 687363497099136.

The previous prime is 687363497099119. The next prime is 687363497099219. The reversal of 687363497099137 is 731990794363786.

It is an a-pointer prime, because the next prime (687363497099219) can be obtained adding 687363497099137 to its sum of digits (82).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 534977285939776 + 152386211159361 = 23129576^2 + 12344481^2 .

It is a cyclic number.

It is not a de Polignac number, because 687363497099137 - 2⁴³ = 678567404076929 is a prime.

It is a super-2 number, since 2×687363497099137² (a number of 30 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (687363497099117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 343681748549568 + 343681748549569.

It is an arithmetic number, because the mean of its divisors is an integer number (343681748549569).

Almost surely, 2^{687363497099137} is an apocalyptic number.

It is an amenable number.

687363497099137 is a deficient number, since it is larger than the sum of its proper divisors (1).

687363497099137 is an equidigital number, since it uses as much as digits as its factorization.

687363497099137 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7777461888, while the sum is 82.

The spelling of 687363497099137 in words is "six hundred eighty-seven trillion, three hundred sixty-three billion, four hundred ninety-seven million, ninety-nine thousand, one hundred thirty-seven".