213412109 has 2 divisors, whose sum is σ = 213412110. Its totient is φ = 213412108.

The previous prime is 213412103. The next prime is 213412127. The reversal of 213412109 is 901214312.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 208802500 + 4609609 = 14450^2 + 2147^2 .

It is a cyclic number.

It is not a de Polignac number, because 213412109 - 2²⁰ = 212363533 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (213412103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106706054 + 106706055.

It is an arithmetic number, because the mean of its divisors is an integer number (106706055).

Almost surely, 2^213412109 is an apocalyptic number.

It is an amenable number.

213412109 is a deficient number, since it is larger than the sum of its proper divisors (1).

213412109 is an equidigital number, since it uses as much as digits as its factorization.

213412109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432, while the sum is 23.

The square root of 213412109 is about 14608.6313185048. The cubic root of 213412109 is about 597.5941708332.

The spelling of 213412109 in words is "two hundred thirteen million, four hundred twelve thousand, one hundred nine".