684318693 has 4 divisors (see below), whose sum is σ = 912424928. Its totient is φ = 456212460.

The previous prime is 684318689. The next prime is 684318743. The reversal of 684318693 is 396813486.

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 not a de Polignac number, because 684318693 - 2² = 684318689 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 (684318623) 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, 114053113 + ... + 114053118.

It is an arithmetic number, because the mean of its divisors is an integer number (228106232).

Almost surely, 2^684318693 is an apocalyptic number.

It is an amenable number.

684318693 is a deficient number, since it is larger than the sum of its proper divisors (228106235).

684318693 is a wasteful number, since it uses less digits than its factorization.

684318693 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 228106234.

The product of its digits is 746496, while the sum is 48.

The square root of 684318693 is about 26159.4857174219. The cubic root of 684318693 is about 881.2236304971.

The spelling of 684318693 in words is "six hundred eighty-four million, three hundred eighteen thousand, six hundred ninety-three".