213166439 has 2 divisors, whose sum is σ = 213166440. Its totient is φ = 213166438.

The previous prime is 213166409. The next prime is 213166441. The reversal of 213166439 is 934661312.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 213166439 - 2⁸ = 213166183 is a prime.

Together with 213166441, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 213166399 and 213166408.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (213166409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106583219 + 106583220.

It is an arithmetic number, because the mean of its divisors is an integer number (106583220).

Almost surely, 2^213166439 is an apocalyptic number.

213166439 is a deficient number, since it is larger than the sum of its proper divisors (1).

213166439 is an equidigital number, since it uses as much as digits as its factorization.

213166439 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 23328, while the sum is 35.

The square root of 213166439 is about 14600.2205120334. The cubic root of 213166439 is about 597.3647753369.

The spelling of 213166439 in words is "two hundred thirteen million, one hundred sixty-six thousand, four hundred thirty-nine".