212659393873 has 4 divisors (see below), whose sum is σ = 213738883380. Its totient is φ = 211579904368.

The previous prime is 212659393867. The next prime is 212659393931. The reversal of 212659393873 is 378393956212.

212659393873 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 117331596369 + 95327797504 = 342537^2 + 308752^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-212659393873 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212659393273) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 539744458 + ... + 539744851.

It is an arithmetic number, because the mean of its divisors is an integer number (53434720845).

Almost surely, 2^212659393873 is an apocalyptic number.

It is an amenable number.

212659393873 is a deficient number, since it is larger than the sum of its proper divisors (1079489507).

212659393873 is a wasteful number, since it uses less digits than its factorization.

212659393873 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1079489506.

The product of its digits is 14696640, while the sum is 58.

The spelling of 212659393873 in words is "two hundred twelve billion, six hundred fifty-nine million, three hundred ninety-three thousand, eight hundred seventy-three".