213872647 has 2 divisors, whose sum is σ = 213872648. Its totient is φ = 213872646.

The previous prime is 213872639. The next prime is 213872693. The reversal of 213872647 is 746278312.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 213872647 - 2³ = 213872639 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (213872447) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106936323 + 106936324.

It is an arithmetic number, because the mean of its divisors is an integer number (106936324).

Almost surely, 2^213872647 is an apocalyptic number.

213872647 is a deficient number, since it is larger than the sum of its proper divisors (1).

213872647 is an equidigital number, since it uses as much as digits as its factorization.

213872647 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 112896, while the sum is 40.

The square root of 213872647 is about 14624.3853546055. The cubic root of 213872647 is about 598.0237264218.

The spelling of 213872647 in words is "two hundred thirteen million, eight hundred seventy-two thousand, six hundred forty-seven".