213986697869 has 4 divisors (see below), whose sum is σ = 244556226144. Its totient is φ = 183417169596.

The previous prime is 213986697829. The next prime is 213986697893. The reversal of 213986697869 is 968796689312.

213986697869 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, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-213986697869 is a prime.

It is a super-2 number, since 2×213986697869² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 213986697796 and 213986697805.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213986697829) 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, 15284764127 + ... + 15284764140.

It is an arithmetic number, because the mean of its divisors is an integer number (61139056536).

Almost surely, 2^213986697869 is an apocalyptic number.

It is an amenable number.

213986697869 is a deficient number, since it is larger than the sum of its proper divisors (30569528275).

213986697869 is an equidigital number, since it uses as much as digits as its factorization.

213986697869 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30569528274.

The product of its digits is 423263232, while the sum is 74.

The spelling of 213986697869 in words is "two hundred thirteen billion, nine hundred eighty-six million, six hundred ninety-seven thousand, eight hundred sixty-nine".