213420439 has 2 divisors, whose sum is σ = 213420440. Its totient is φ = 213420438.

The previous prime is 213420419. The next prime is 213420469. The reversal of 213420439 is 934024312.

213420439 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 a de Polignac number, because none of the positive numbers 2^k-213420439 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (213420419) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106710219 + 106710220.

It is an arithmetic number, because the mean of its divisors is an integer number (106710220).

Almost surely, 2^213420439 is an apocalyptic number.

213420439 is a deficient number, since it is larger than the sum of its proper divisors (1).

213420439 is an equidigital number, since it uses as much as digits as its factorization.

213420439 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5184, while the sum is 28.

The square root of 213420439 is about 14608.9164211450. The cubic root of 213420439 is about 597.6019459226.

The spelling of 213420439 in words is "two hundred thirteen million, four hundred twenty thousand, four hundred thirty-nine".