687274 has 12 divisors (see below), whose sum is σ = 1199394. Its totient is φ = 294504.

The previous prime is 687233. The next prime is 687277. The reversal of 687274 is 472786.

It can be written as a sum of positive squares in only one way, i.e., 480249 + 207025 = 693^2 + 455^2 .

It is a plaindrome in base 9.

It is not an unprimeable number, because it can be changed into a prime (687277) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3409 + ... + 3604.

2⁶⁸⁷²⁷⁴ is an apocalyptic number.

687274 is a deficient number, since it is larger than the sum of its proper divisors (512120).

687274 is a wasteful number, since it uses less digits than its factorization.

687274 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7029 (or 7022 counting only the distinct ones).

The product of its digits is 18816, while the sum is 34.

The square root of 687274 is about 829.0199032593. The cubic root of 687274 is about 88.2490363084.

It can be divided in two parts, 687 and 274, that added together give a square (961 = 31²).

The spelling of 687274 in words is "six hundred eighty-seven thousand, two hundred seventy-four".