687738039 has 4 divisors (see below), whose sum is σ = 916984056. Its totient is φ = 458492024.

The previous prime is 687737993. The next prime is 687738047. The reversal of 687738039 is 930837786.

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 687738039 - 2⁹ = 687737527 is a prime.

It is a super-2 number, since 2×687738039² = 945967220575131042, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 687737982 and 687738000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (687738089) 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 3 ways as a sum of consecutive naturals, for example, 114623004 + ... + 114623009.

It is an arithmetic number, because the mean of its divisors is an integer number (229246014).

Almost surely, 2^687738039 is an apocalyptic number.

687738039 is a deficient number, since it is larger than the sum of its proper divisors (229246017).

687738039 is a wasteful number, since it uses less digits than its factorization.

687738039 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 229246016.

The product of its (nonzero) digits is 1524096, while the sum is 51.

The square root of 687738039 is about 26224.7600370337. The cubic root of 687738039 is about 882.6889339670.

The spelling of 687738039 in words is "six hundred eighty-seven million, seven hundred thirty-eight thousand, thirty-nine".