693984565 has 4 divisors (see below), whose sum is σ = 832781484. Its totient is φ = 555187648.

The previous prime is 693984547. The next prime is 693984583. The reversal of 693984565 is 565489396.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (693984547) and next prime (693984583).

It can be written as a sum of positive squares in 2 ways, for example, as 290054961 + 403929604 = 17031^2 + 20098^2 .

It is a cyclic number.

It is not a de Polignac number, because 693984565 - 2²³ = 685595957 is a prime.

It is a super-2 number, since 2×693984565² = 963229152916478450, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 69398452 + ... + 69398461.

It is an arithmetic number, because the mean of its divisors is an integer number (208195371).

Almost surely, 2^693984565 is an apocalyptic number.

It is an amenable number.

693984565 is a deficient number, since it is larger than the sum of its proper divisors (138796919).

693984565 is a wasteful number, since it uses less digits than its factorization.

693984565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138796918.

The product of its digits is 6998400, while the sum is 55.

The square root of 693984565 is about 26343.5867907163. The cubic root of 693984565 is about 885.3532865531.

The spelling of 693984565 in words is "six hundred ninety-three million, nine hundred eighty-four thousand, five hundred sixty-five".