688034 has 4 divisors (see below), whose sum is σ = 1032054. Its totient is φ = 344016.

The previous prime is 688031. The next prime is 688063. The reversal of 688034 is 430886.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 430886 = 2 ⋅215443.

It can be written as a sum of positive squares in only one way, i.e., 525625 + 162409 = 725^2 + 403^2 .

It is a junction number, because it is equal to n+sod(n) for n = 687988 and 688006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (688031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 172007 + ... + 172010.

2⁶⁸⁸⁰³⁴ is an apocalyptic number.

688034 is a deficient number, since it is larger than the sum of its proper divisors (344020).

688034 is a wasteful number, since it uses less digits than its factorization.

688034 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 344019.

The product of its (nonzero) digits is 4608, while the sum is 29.

The square root of 688034 is about 829.4781491998. The cubic root of 688034 is about 88.2815534513.

The spelling of 688034 in words is "six hundred eighty-eight thousand, thirty-four".