684461 has 4 divisors (see below), whose sum is σ = 699072. Its totient is φ = 669852.

The previous prime is 684451. The next prime is 684469. The reversal of 684461 is 164486.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 684461 - 2¹⁰ = 683437 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (684469) 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 3 ways as a sum of consecutive naturals, for example, 7235 + ... + 7328.

It is an arithmetic number, because the mean of its divisors is an integer number (174768).

2⁶⁸⁴⁴⁶¹ is an apocalyptic number.

It is an amenable number.

684461 is a deficient number, since it is larger than the sum of its proper divisors (14611).

684461 is a wasteful number, since it uses less digits than its factorization.

684461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14610.

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

The square root of 684461 is about 827.3215819740. The cubic root of 684461 is about 88.1284711005.

The spelling of 684461 in words is "six hundred eighty-four thousand, four hundred sixty-one".