213534389 has 6 divisors (see below), whose sum is σ = 214291350. Its totient is φ = 212780040.

The previous prime is 213534367. The next prime is 213534397. The reversal of 213534389 is 983435312.

It can be written as a sum of positive squares in only one way, i.e., 202578289 + 10956100 = 14233^2 + 3310^2 .

It is not a de Polignac number, because 213534389 - 2²⁴ = 196757173 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 (213534329) 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, 108587 + ... + 110535.

It is an arithmetic number, because the mean of its divisors is an integer number (35715225).

Almost surely, 2^213534389 is an apocalyptic number.

It is an amenable number.

213534389 is a deficient number, since it is larger than the sum of its proper divisors (756961).

213534389 is an frugal number, since it uses more digits than its factorization.

213534389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2611 (or 2280 counting only the distinct ones).

The product of its digits is 77760, while the sum is 38.

The square root of 213534389 is about 14612.8159161744. The cubic root of 213534389 is about 597.7082847315.

The spelling of 213534389 in words is "two hundred thirteen million, five hundred thirty-four thousand, three hundred eighty-nine".