213689471 has 2 divisors, whose sum is σ = 213689472. Its totient is φ = 213689470.

The previous prime is 213689461. The next prime is 213689477. The reversal of 213689471 is 174986312.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 213689471 - 2¹⁴ = 213673087 is a prime.

It is a super-3 number, since 3×213689471³ (a number of 26 digits) contains 333 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (213689477) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106844735 + 106844736.

It is an arithmetic number, because the mean of its divisors is an integer number (106844736).

Almost surely, 2^213689471 is an apocalyptic number.

213689471 is a deficient number, since it is larger than the sum of its proper divisors (1).

213689471 is an equidigital number, since it uses as much as digits as its factorization.

213689471 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 72576, while the sum is 41.

The square root of 213689471 is about 14618.1213225229. The cubic root of 213689471 is about 597.8529474026.

The spelling of 213689471 in words is "two hundred thirteen million, six hundred eighty-nine thousand, four hundred seventy-one".