687852243 has 40 divisors (see below), whose sum is σ = 1110640608. Its totient is φ = 421739136.

The previous prime is 687852241. The next prime is 687852281. The reversal of 687852243 is 342258786.

687852243 is a `hidden beast` number, since 6 + 87 + 8 + 522 + 43 = 666.

It is not a de Polignac number, because 687852243 - 2¹ = 687852241 is a prime.

It is not an unprimeable number, because it can be changed into a prime (687852241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 328546 + ... + 330632.

Almost surely, 2^687852243 is an apocalyptic number.

687852243 is a deficient number, since it is larger than the sum of its proper divisors (422788365).

687852243 is a wasteful number, since it uses less digits than its factorization.

687852243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2425 (or 2416 counting only the distinct ones).

The product of its digits is 645120, while the sum is 45.

The square root of 687852243 is about 26226.9373545597. The cubic root of 687852243 is about 882.7377902766.

The spelling of 687852243 in words is "six hundred eighty-seven million, eight hundred fifty-two thousand, two hundred forty-three".