687422747 has 16 divisors (see below), whose sum is σ = 774057600. Its totient is φ = 605130240.

The previous prime is 687422719. The next prime is 687422753. The reversal of 687422747 is 747224786.

It is a de Polignac number, because none of the positive numbers 2^k-687422747 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (687422707) 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 15 ways as a sum of consecutive naturals, for example, 35579 + ... + 51387.

It is an arithmetic number, because the mean of its divisors is an integer number (48378600).

Almost surely, 2^687422747 is an apocalyptic number.

687422747 is a gapful number since it is divisible by the number (67) formed by its first and last digit.

687422747 is a deficient number, since it is larger than the sum of its proper divisors (86634853).

687422747 is a wasteful number, since it uses less digits than its factorization.

687422747 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15946.

The product of its digits is 1053696, while the sum is 47.

The square root of 687422747 is about 26218.7480059594. The cubic root of 687422747 is about 882.5540244114.

The spelling of 687422747 in words is "six hundred eighty-seven million, four hundred twenty-two thousand, seven hundred forty-seven".