687252417 has 16 divisors (see below), whose sum is σ = 924467520. Its totient is φ = 454113792.

The previous prime is 687252409. The next prime is 687252437. The reversal of 687252417 is 714252786.

687252417 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 687252417 - 2³ = 687252409 is a prime.

It is not an unprimeable number, because it can be changed into a prime (687252407) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 460809 + ... + 462297.

It is an arithmetic number, because the mean of its divisors is an integer number (57779220).

Almost surely, 2^687252417 is an apocalyptic number.

It is an amenable number.

687252417 is a deficient number, since it is larger than the sum of its proper divisors (237215103).

687252417 is a wasteful number, since it uses less digits than its factorization.

687252417 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2752.

The product of its digits is 188160, while the sum is 42.

The square root of 687252417 is about 26215.4995565600. The cubic root of 687252417 is about 882.4811251437.

The spelling of 687252417 in words is "six hundred eighty-seven million, two hundred fifty-two thousand, four hundred seventeen".