680534 has 4 divisors (see below), whose sum is σ = 1020804. Its totient is φ = 340266.

The previous prime is 680531. The next prime is 680539. The reversal of 680534 is 435086.

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

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (680531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 170132 + ... + 170135.

It is an arithmetic number, because the mean of its divisors is an integer number (255201).

2⁶⁸⁰⁵³⁴ is an apocalyptic number.

680534 is a deficient number, since it is larger than the sum of its proper divisors (340270).

680534 is a wasteful number, since it uses less digits than its factorization.

680534 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 340269.

The product of its (nonzero) digits is 2880, while the sum is 26.

The square root of 680534 is about 824.9448466413. The cubic root of 680534 is about 87.9596061168.

The spelling of 680534 in words is "six hundred eighty thousand, five hundred thirty-four".