684353 has 4 divisors (see below), whose sum is σ = 688128. Its totient is φ = 680580.

The previous prime is 684349. The next prime is 684373. The reversal of 684353 is 353486.

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 684353 - 2² = 684349 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (684373) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1601 + ... + 1982.

It is an arithmetic number, because the mean of its divisors is an integer number (172032).

2⁶⁸⁴³⁵³ is an apocalyptic number.

It is an amenable number.

684353 is a deficient number, since it is larger than the sum of its proper divisors (3775).

684353 is a wasteful number, since it uses less digits than its factorization.

684353 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3774.

The product of its digits is 8640, while the sum is 29.

The square root of 684353 is about 827.2563085284. The cubic root of 684353 is about 88.1238356401.

The spelling of 684353 in words is "six hundred eighty-four thousand, three hundred fifty-three".