213765829 has 6 divisors (see below), whose sum is σ = 215687186. Its totient is φ = 211861440.

The previous prime is 213765817. The next prime is 213765847. The reversal of 213765829 is 928567312.

It can be written as a sum of positive squares in 3 ways, for example, as 664225 + 213101604 = 815^2 + 14598^2 .

It is not a de Polignac number, because 213765829 - 2²⁵ = 180211397 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 (213765809) 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 5 ways as a sum of consecutive naturals, for example, 4399 + ... + 21139.

Almost surely, 2^213765829 is an apocalyptic number.

It is an amenable number.

213765829 is a deficient number, since it is larger than the sum of its proper divisors (1921357).

213765829 is an equidigital number, since it uses as much as digits as its factorization.

213765829 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16967 (or 16854 counting only the distinct ones).

The product of its digits is 181440, while the sum is 43.

The square root of 213765829 is about 14620.7328475696. The cubic root of 213765829 is about 597.9241495052.

The spelling of 213765829 in words is "two hundred thirteen million, seven hundred sixty-five thousand, eight hundred twenty-nine".