213209047 has 2 divisors, whose sum is σ = 213209048. Its totient is φ = 213209046.

The previous prime is 213209039. The next prime is 213209063. The reversal of 213209047 is 740902312.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 213209047 - 2³ = 213209039 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 (213206047) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106604523 + 106604524.

It is an arithmetic number, because the mean of its divisors is an integer number (106604524).

Almost surely, 2^213209047 is an apocalyptic number.

213209047 is a deficient number, since it is larger than the sum of its proper divisors (1).

213209047 is an equidigital number, since it uses as much as digits as its factorization.

213209047 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3024, while the sum is 28.

The square root of 213209047 is about 14601.6795951699. The cubic root of 213209047 is about 597.4045733821.

The spelling of 213209047 in words is "two hundred thirteen million, two hundred nine thousand, forty-seven".