687130251 has 8 divisors (see below), whose sum is σ = 918361920. Its totient is φ = 456992712.

The previous prime is 687130247. The next prime is 687130253. The reversal of 687130251 is 152031786.

687130251 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 687130251 - 2² = 687130247 is a prime.

It is not an unprimeable number, because it can be changed into a prime (687130253) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 272065 + ... + 274578.

It is an arithmetic number, because the mean of its divisors is an integer number (114795240).

Almost surely, 2^687130251 is an apocalyptic number.

687130251 is a deficient number, since it is larger than the sum of its proper divisors (231231669).

687130251 is a wasteful number, since it uses less digits than its factorization.

687130251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 547065.

The product of its (nonzero) digits is 10080, while the sum is 33.

The square root of 687130251 is about 26213.1694192061. The cubic root of 687130251 is about 882.4288320923.

The spelling of 687130251 in words is "six hundred eighty-seven million, one hundred thirty thousand, two hundred fifty-one".