688514 has 4 divisors (see below), whose sum is σ = 1032774. Its totient is φ = 344256.

The previous prime is 688511. The next prime is 688531. The reversal of 688514 is 415886.

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

It can be written as a sum of positive squares in only one way, i.e., 667489 + 21025 = 817^2 + 145^2 .

It is not an unprimeable number, because it can be changed into a prime (688511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 172127 + ... + 172130.

2⁶⁸⁸⁵¹⁴ is an apocalyptic number.

688514 is a deficient number, since it is larger than the sum of its proper divisors (344260).

688514 is a wasteful number, since it uses less digits than its factorization.

688514 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 344259.

The product of its digits is 7680, while the sum is 32.

The square root of 688514 is about 829.7674372979. The cubic root of 688514 is about 88.3020782584.

The spelling of 688514 in words is "six hundred eighty-eight thousand, five hundred fourteen".