687506874601 has 4 divisors (see below), whose sum is σ = 687554510212. Its totient is φ = 687459238992.

The previous prime is 687506874557. The next prime is 687506874629. The reversal of 687506874601 is 106478605786.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 335293112025 + 352213762576 = 579045^2 + 593476^2 .

It is a cyclic number.

It is not a de Polignac number, because 687506874601 - 2³¹ = 685359390953 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (687516874601) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23796150 + ... + 23825023.

It is an arithmetic number, because the mean of its divisors is an integer number (171888627553).

Almost surely, 2^687506874601 is an apocalyptic number.

It is an amenable number.

687506874601 is a deficient number, since it is larger than the sum of its proper divisors (47635611).

687506874601 is a wasteful number, since it uses less digits than its factorization.

687506874601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47635610.

The product of its (nonzero) digits is 13547520, while the sum is 58.

The spelling of 687506874601 in words is "six hundred eighty-seven billion, five hundred six million, eight hundred seventy-four thousand, six hundred one".