685964 has 6 divisors (see below), whose sum is σ = 1200444. Its totient is φ = 342980.

The previous prime is 685963. The next prime is 685969. The reversal of 685964 is 469586.

It is not an unprimeable number, because it can be changed into a prime (685963) 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 as a sum of consecutive naturals, namely, 85742 + ... + 85749.

It is an arithmetic number, because the mean of its divisors is an integer number (200074).

2⁶⁸⁵⁹⁶⁴ is an apocalyptic number.

It is an amenable number.

685964 is a deficient number, since it is larger than the sum of its proper divisors (514480).

685964 is a wasteful number, since it uses less digits than its factorization.

685964 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 171495 (or 171493 counting only the distinct ones).

The product of its digits is 51840, while the sum is 38.

The square root of 685964 is about 828.2294368108. The cubic root of 685964 is about 88.1929307052.

It can be divided in two parts, 6859 and 64, that multiplied together give a cube (438976 = 76³).

The spelling of 685964 in words is "six hundred eighty-five thousand, nine hundred sixty-four".