687506973 has 16 divisors (see below), whose sum is σ = 949605120. Its totient is φ = 441917504.

The previous prime is 687506969. The next prime is 687506977. The reversal of 687506973 is 379605786.

687506973 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (687506969) and next prime (687506977).

It is a cyclic number.

It is not a de Polignac number, because 687506973 - 2² = 687506969 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (687506977) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 62140 + ... + 72362.

It is an arithmetic number, because the mean of its divisors is an integer number (59350320).

Almost surely, 2^687506973 is an apocalyptic number.

It is an amenable number.

687506973 is a deficient number, since it is larger than the sum of its proper divisors (262098147).

687506973 is a wasteful number, since it uses less digits than its factorization.

687506973 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11028.

The product of its (nonzero) digits is 1905120, while the sum is 51.

The square root of 687506973 is about 26220.3541738093. The cubic root of 687506973 is about 882.5900677146.

The spelling of 687506973 in words is "six hundred eighty-seven million, five hundred six thousand, nine hundred seventy-three".