687049454 has 64 divisors (see below), whose sum is σ = 1303948800. Its totient is φ = 264290688.

The previous prime is 687049421. The next prime is 687049457. The reversal of 687049454 is 454940786.

It is a junction number, because it is equal to n+sod(n) for n = 687049399 and 687049408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (687049457) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1170149 + ... + 1170735.

It is an arithmetic number, because the mean of its divisors is an integer number (20374200).

Almost surely, 2^687049454 is an apocalyptic number.

687049454 is a deficient number, since it is larger than the sum of its proper divisors (616899346).

687049454 is a wasteful number, since it uses less digits than its factorization.

687049454 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 777.

The product of its (nonzero) digits is 967680, while the sum is 47.

The square root of 687049454 is about 26211.6282210778. The cubic root of 687049454 is about 882.3942436006.

The spelling of 687049454 in words is "six hundred eighty-seven million, forty-nine thousand, four hundred fifty-four".