213104389 has 2 divisors, whose sum is σ = 213104390. Its totient is φ = 213104388.

The previous prime is 213104371. The next prime is 213104393. The reversal of 213104389 is 983401312.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 173791489 + 39312900 = 13183^2 + 6270^2 .

It is a cyclic number.

It is not a de Polignac number, because 213104389 - 2¹³ = 213096197 is a prime.

It is a super-2 number, since 2×213104389² = 90826961222126642, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 213104389.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (213104329) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106552194 + 106552195.

It is an arithmetic number, because the mean of its divisors is an integer number (106552195).

Almost surely, 2^213104389 is an apocalyptic number.

It is an amenable number.

213104389 is a deficient number, since it is larger than the sum of its proper divisors (1).

213104389 is an equidigital number, since it uses as much as digits as its factorization.

213104389 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5184, while the sum is 31.

The square root of 213104389 is about 14598.0953894678. The cubic root of 213104389 is about 597.3068079858.

The spelling of 213104389 in words is "two hundred thirteen million, one hundred four thousand, three hundred eighty-nine".