687795254 has 16 divisors (see below), whose sum is σ = 1067332896. Its totient is φ = 332184000.

The previous prime is 687795253. The next prime is 687795271. The reversal of 687795254 is 452597786.

It is a super-2 number, since 2×687795254² = 946124622849849032, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 687795196 and 687795205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (687795253) 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, 33242 + ... + 49805.

It is an arithmetic number, because the mean of its divisors is an integer number (66708306).

Almost surely, 2^687795254 is an apocalyptic number.

687795254 is a deficient number, since it is larger than the sum of its proper divisors (379537642).

687795254 is a wasteful number, since it uses less digits than its factorization.

687795254 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83191.

The product of its digits is 4233600, while the sum is 53.

The square root of 687795254 is about 26225.8508727553. The cubic root of 687795254 is about 882.7134111390.

The spelling of 687795254 in words is "six hundred eighty-seven million, seven hundred ninety-five thousand, two hundred fifty-four".