687112431 has 4 divisors (see below), whose sum is σ = 916149912. Its totient is φ = 458074952.

The previous prime is 687112379. The next prime is 687112441. The reversal of 687112431 is 134211786.

687112431 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 687112431 - 2⁶ = 687112367 is a prime.

It is a super-2 number, since 2×687112431² = 944246985669459522, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 687112392 and 687112401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (687112441) 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, 114518736 + ... + 114518741.

It is an arithmetic number, because the mean of its divisors is an integer number (229037478).

Almost surely, 2^687112431 is an apocalyptic number.

687112431 is a deficient number, since it is larger than the sum of its proper divisors (229037481).

687112431 is a wasteful number, since it uses less digits than its factorization.

687112431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 229037480.

The product of its digits is 8064, while the sum is 33.

The square root of 687112431 is about 26212.8295115197. The cubic root of 687112431 is about 882.4212037387.

The spelling of 687112431 in words is "six hundred eighty-seven million, one hundred twelve thousand, four hundred thirty-one".