687484943 has 4 divisors (see below), whose sum is σ = 688885608. Its totient is φ = 686084280.

The previous prime is 687484921. The next prime is 687484949. The reversal of 687484943 is 349484786.

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 687484943 - 2¹² = 687480847 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (687484949) 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, 699596 + ... + 700577.

It is an arithmetic number, because the mean of its divisors is an integer number (172221402).

Almost surely, 2^687484943 is an apocalyptic number.

687484943 is a deficient number, since it is larger than the sum of its proper divisors (1400665).

687484943 is a wasteful number, since it uses less digits than its factorization.

687484943 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1400664.

The product of its digits is 4644864, while the sum is 53.

The square root of 687484943 is about 26219.9340769576. The cubic root of 687484943 is about 882.5806405778.

The spelling of 687484943 in words is "six hundred eighty-seven million, four hundred eighty-four thousand, nine hundred forty-three".