684629 has 8 divisors (see below), whose sum is σ = 755040. Its totient is φ = 615600.

The previous prime is 684617. The next prime is 684637. The reversal of 684629 is 926486.

684629 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 684629 - 2⁸ = 684373 is a prime.

It is a d-powerful number, because it can be written as 6² + 8⁵ + 6⁶ + 4⁸ + 2¹³ + 9⁶ .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (684329) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 914 + ... + 1484.

It is an arithmetic number, because the mean of its divisors is an integer number (94380).

2⁶⁸⁴⁶²⁹ is an apocalyptic number.

It is an amenable number.

684629 is a deficient number, since it is larger than the sum of its proper divisors (70411).

684629 is a wasteful number, since it uses less digits than its factorization.

684629 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 691.

The product of its digits is 20736, while the sum is 35.

The square root of 684629 is about 827.4231082101. The cubic root of 684629 is about 88.1356808475.

The spelling of 684629 in words is "six hundred eighty-four thousand, six hundred twenty-nine".