687695007 has 4 divisors (see below), whose sum is σ = 916926680. Its totient is φ = 458463336.

The previous prime is 687694993. The next prime is 687695017. The reversal of 687695007 is 700596786.

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

It is not a de Polignac number, because 687695007 - 2¹⁰ = 687693983 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (687695017) 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, 114615832 + ... + 114615837.

It is an arithmetic number, because the mean of its divisors is an integer number (229231670).

Almost surely, 2^687695007 is an apocalyptic number.

687695007 is a deficient number, since it is larger than the sum of its proper divisors (229231673).

687695007 is a wasteful number, since it uses less digits than its factorization.

687695007 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 229231672.

The product of its (nonzero) digits is 635040, while the sum is 48.

The square root of 687695007 is about 26223.9395781793. The cubic root of 687695007 is about 882.6705235353.

The spelling of 687695007 in words is "six hundred eighty-seven million, six hundred ninety-five thousand, seven".