687127625 has 8 divisors (see below), whose sum is σ = 857535432. Its totient is φ = 549702000.

The previous prime is 687127621. The next prime is 687127631. The reversal of 687127625 is 526721786.

687127625 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 3200521 + 683927104 = 1789^2 + 26152^2 .

It is not a de Polignac number, because 687127625 - 2² = 687127621 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (687127621) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2748386 + ... + 2748635.

It is an arithmetic number, because the mean of its divisors is an integer number (107191929).

Almost surely, 2^687127625 is an apocalyptic number.

It is an amenable number.

687127625 is a deficient number, since it is larger than the sum of its proper divisors (170407807).

687127625 is an equidigital number, since it uses as much as digits as its factorization.

687127625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5497036 (or 5497026 counting only the distinct ones).

The product of its digits is 282240, while the sum is 44.

The square root of 687127625 is about 26213.1193298318. The cubic root of 687127625 is about 882.4277079672.

The spelling of 687127625 in words is "six hundred eighty-seven million, one hundred twenty-seven thousand, six hundred twenty-five".