687730043 has 48 divisors (see below), whose sum is σ = 955876320. Its totient is φ = 486259200.

The previous prime is 687730039. The next prime is 687730079. The reversal of 687730043 is 340037786.

It is not a de Polignac number, because 687730043 - 2² = 687730039 is a prime.

It is a super-2 number, since 2×687730043² = 945945224089563698, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 687729979 and 687730006.

It is not an unprimeable number, because it can be changed into a prime (687730943) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 426623 + ... + 428231.

It is an arithmetic number, because the mean of its divisors is an integer number (19914090).

Almost surely, 2^687730043 is an apocalyptic number.

687730043 is a deficient number, since it is larger than the sum of its proper divisors (268146277).

687730043 is a wasteful number, since it uses less digits than its factorization.

687730043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1708 (or 1701 counting only the distinct ones).

The product of its (nonzero) digits is 84672, while the sum is 38.

The square root of 687730043 is about 26224.6075852433. The cubic root of 687730043 is about 882.6855130869.

The spelling of 687730043 in words is "six hundred eighty-seven million, seven hundred thirty thousand, forty-three".