213928439 has 2 divisors, whose sum is σ = 213928440. Its totient is φ = 213928438.

The previous prime is 213928423. The next prime is 213928501. The reversal of 213928439 is 934829312.

213928439 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 213928439 - 2⁴ = 213928423 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 213928396 and 213928405.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (213928639) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106964219 + 106964220.

It is an arithmetic number, because the mean of its divisors is an integer number (106964220).

Almost surely, 2^213928439 is an apocalyptic number.

213928439 is a deficient number, since it is larger than the sum of its proper divisors (1).

213928439 is an equidigital number, since it uses as much as digits as its factorization.

213928439 is an evil number, because the sum of its binary digits is even.

The product of its digits is 93312, while the sum is 41.

The square root of 213928439 is about 14626.2927291915. The cubic root of 213928439 is about 598.0757231582.

The spelling of 213928439 in words is "two hundred thirteen million, nine hundred twenty-eight thousand, four hundred thirty-nine".