687204897 has 4 divisors (see below), whose sum is σ = 916273200. Its totient is φ = 458136596.

The previous prime is 687204883. The next prime is 687204913. The reversal of 687204897 is 798402786.

687204897 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 687204897 - 2¹⁶ = 687139361 is a prime.

It is not an unprimeable number, because it can be changed into a prime (687202897) 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, 114534147 + ... + 114534152.

It is an arithmetic number, because the mean of its divisors is an integer number (229068300).

Almost surely, 2^687204897 is an apocalyptic number.

It is an amenable number.

687204897 is a deficient number, since it is larger than the sum of its proper divisors (229068303).

687204897 is a wasteful number, since it uses less digits than its factorization.

687204897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 229068302.

The product of its (nonzero) digits is 1354752, while the sum is 51.

The square root of 687204897 is about 26214.5932068381. The cubic root of 687204897 is about 882.4607849850.

The spelling of 687204897 in words is "six hundred eighty-seven million, two hundred four thousand, eight hundred ninety-seven".