683457665381 has 4 divisors (see below), whose sum is σ = 687233674764. Its totient is φ = 679681656000.

The previous prime is 683457665357. The next prime is 683457665413. The reversal of 683457665381 is 183566754386.

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

It can be written as a sum of positive squares in 2 ways, for example, as 315990136900 + 367467528481 = 562130^2 + 606191^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-683457665381 is a prime.

It is a super-2 number, since 2×683457665381² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (683457665981) by changing a digit.

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, 1888004420 + ... + 1888004781.

It is an arithmetic number, because the mean of its divisors is an integer number (171808418691).

Almost surely, 2^683457665381 is an apocalyptic number.

It is an amenable number.

683457665381 is a deficient number, since it is larger than the sum of its proper divisors (3776009383).

683457665381 is a wasteful number, since it uses less digits than its factorization.

683457665381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3776009382.

The product of its digits is 87091200, while the sum is 62.

The spelling of 683457665381 in words is "six hundred eighty-three billion, four hundred fifty-seven million, six hundred sixty-five thousand, three hundred eighty-one".