687561051103 has 2 divisors, whose sum is σ = 687561051104. Its totient is φ = 687561051102.

The previous prime is 687561051091. The next prime is 687561051139. The reversal of 687561051103 is 301150165786.

687561051103 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 687561051103 - 2³⁷ = 550122097631 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 687561051103.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (687561051173) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 343780525551 + 343780525552.

It is an arithmetic number, because the mean of its divisors is an integer number (343780525552).

Almost surely, 2^687561051103 is an apocalyptic number.

687561051103 is a deficient number, since it is larger than the sum of its proper divisors (1).

687561051103 is an equidigital number, since it uses as much as digits as its factorization.

687561051103 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 151200, while the sum is 43.

The spelling of 687561051103 in words is "six hundred eighty-seven billion, five hundred sixty-one million, fifty-one thousand, one hundred three".