687536422 has 4 divisors (see below), whose sum is σ = 1031304636. Its totient is φ = 343768210.

The previous prime is 687536407. The next prime is 687536449. The reversal of 687536422 is 224635786.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 171884104 + ... + 171884107.

It is an arithmetic number, because the mean of its divisors is an integer number (257826159).

Almost surely, 2^687536422 is an apocalyptic number.

687536422 is a deficient number, since it is larger than the sum of its proper divisors (343768214).

687536422 is a wasteful number, since it uses less digits than its factorization.

687536422 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 343768213.

The product of its digits is 483840, while the sum is 43.

The square root of 687536422 is about 26220.9157353438. The cubic root of 687536422 is about 882.6026692953.

The spelling of 687536422 in words is "six hundred eighty-seven million, five hundred thirty-six thousand, four hundred twenty-two".