687597243 has 4 divisors (see below), whose sum is σ = 916796328. Its totient is φ = 458398160.

The previous prime is 687597241. The next prime is 687597319. The reversal of 687597243 is 342795786.

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

It is a cyclic number.

It is not a de Polignac number, because 687597243 - 2¹ = 687597241 is a prime.

It is not an unprimeable number, because it can be changed into a prime (687597241) 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, 114599538 + ... + 114599543.

It is an arithmetic number, because the mean of its divisors is an integer number (229199082).

Almost surely, 2^687597243 is an apocalyptic number.

687597243 is a deficient number, since it is larger than the sum of its proper divisors (229199085).

687597243 is a wasteful number, since it uses less digits than its factorization.

687597243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 229199084.

The product of its digits is 2540160, while the sum is 51.

The square root of 687597243 is about 26222.0754899379. The cubic root of 687597243 is about 882.6286941925.

The spelling of 687597243 in words is "six hundred eighty-seven million, five hundred ninety-seven thousand, two hundred forty-three".