213886320689 has 6 divisors (see below), whose sum is σ = 219106093794. Its totient is φ = 208666692080.

The previous prime is 213886320679. The next prime is 213886320719. The reversal of 213886320689 is 986023688312.

It can be written as a sum of positive squares in only one way, i.e., 130418488225 + 83467832464 = 361135^2 + 288908^2 .

It is not a de Polignac number, because 213886320689 - 2²⁸ = 213617885233 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213886320679) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2925194 + ... + 2997420.

It is an arithmetic number, because the mean of its divisors is an integer number (36517682299).

Almost surely, 2^213886320689 is an apocalyptic number.

It is an amenable number.

213886320689 is a deficient number, since it is larger than the sum of its proper divisors (5219773105).

213886320689 is an frugal number, since it uses more digits than its factorization.

213886320689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144495 (or 72268 counting only the distinct ones).

The product of its (nonzero) digits is 5971968, while the sum is 56.

The spelling of 213886320689 in words is "two hundred thirteen billion, eight hundred eighty-six million, three hundred twenty thousand, six hundred eighty-nine".