693685 has 8 divisors (see below), whose sum is σ = 881496. Its totient is φ = 522240.

The previous prime is 693683. The next prime is 693689. The reversal of 693685 is 586396.

693685 = 126² + 127² + ... + 159².

It can be written as a sum of positive squares in 4 ways, for example, as 106929 + 586756 = 327^2 + 766^2 .

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

It is not a de Polignac number, because 693685 - 2¹ = 693683 is a prime.

It is a super-3 number, since 3×693685³ = 1001401333605582375, which contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (693683) 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 7 ways as a sum of consecutive naturals, for example, 3996 + ... + 4165.

It is an arithmetic number, because the mean of its divisors is an integer number (110187).

2⁶⁹³⁶⁸⁵ is an apocalyptic number.

It is an amenable number.

693685 is a deficient number, since it is larger than the sum of its proper divisors (187811).

693685 is a wasteful number, since it uses less digits than its factorization.

693685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8183.

The product of its digits is 38880, while the sum is 37.

The square root of 693685 is about 832.8775420192. The cubic root of 693685 is about 88.5225877846.

It can be divided in two parts, 6936 and 85, that added together give a triangular number (7021 = T₁₁₈).

The spelling of 693685 in words is "six hundred ninety-three thousand, six hundred eighty-five".