693840686841 has 9 divisors (see below), whose sum is σ = 1002217934991. Its totient is φ = 462558791952.

The previous prime is 693840686831. The next prime is 693840686863. The reversal of 693840686841 is 148686048396.

The square root of 693840686841 is 832971.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 1443620025 + 692397066816 = 37995^2 + 832104^2 .

It is a tau number, because it is divible by the number of its divisors (9).

It is not a de Polignac number, because 693840686841 - 2¹³ = 693840678649 is a prime.

It is not an unprimeable number, because it can be changed into a prime (693840686831) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 2360085 + ... + 2637741.

Almost surely, 2^693840686841 is an apocalyptic number.

693840686841 is the 832971-st square number.

693840686841 is the 416486-th centered octagonal number.

It is an amenable number.

693840686841 is a deficient number, since it is larger than the sum of its proper divisors (308377248150).

693840686841 is an frugal number, since it uses more digits than its factorization.

693840686841 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 555320 (or 277660 counting only the distinct ones).

The product of its (nonzero) digits is 47775744, while the sum is 63.

The spelling of 693840686841 in words is "six hundred ninety-three billion, eight hundred forty million, six hundred eighty-six thousand, eight hundred forty-one".