213361493 has 2 divisors, whose sum is σ = 213361494. Its totient is φ = 213361492.

The previous prime is 213361481. The next prime is 213361549. The reversal of 213361493 is 394163312.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 167365969 + 45995524 = 12937^2 + 6782^2 .

It is a cyclic number.

It is not a de Polignac number, because 213361493 - 2⁶ = 213361429 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (213361453) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106680746 + 106680747.

It is an arithmetic number, because the mean of its divisors is an integer number (106680747).

Almost surely, 2^213361493 is an apocalyptic number.

It is an amenable number.

213361493 is a deficient number, since it is larger than the sum of its proper divisors (1).

213361493 is an equidigital number, since it uses as much as digits as its factorization.

213361493 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11664, while the sum is 32.

The square root of 213361493 is about 14606.8988152859. The cubic root of 213361493 is about 597.5469223142.

The spelling of 213361493 in words is "two hundred thirteen million, three hundred sixty-one thousand, four hundred ninety-three".