687851746 has 8 divisors (see below), whose sum is σ = 1065060864. Its totient is φ = 332831460.

The previous prime is 687851743. The next prime is 687851761. The reversal of 687851746 is 647158786.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 687851693 and 687851702.

It is not an unprimeable number, because it can be changed into a prime (687851743) 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, 5547130 + ... + 5547253.

It is an arithmetic number, because the mean of its divisors is an integer number (133132608).

Almost surely, 2^687851746 is an apocalyptic number.

687851746 is a deficient number, since it is larger than the sum of its proper divisors (377209118).

687851746 is a wasteful number, since it uses less digits than its factorization.

687851746 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11094416.

The product of its digits is 2257920, while the sum is 52.

The square root of 687851746 is about 26226.9278795668. The cubic root of 687851746 is about 882.7375776724.

The spelling of 687851746 in words is "six hundred eighty-seven million, eight hundred fifty-one thousand, seven hundred forty-six".