213010409 has 2 divisors, whose sum is σ = 213010410. Its totient is φ = 213010408.

The previous prime is 213010403. The next prime is 213010417. The reversal of 213010409 is 904010312.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 197486809 + 15523600 = 14053^2 + 3940^2 .

It is a cyclic number.

It is not a de Polignac number, because 213010409 - 2²⁰ = 211961833 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (213010403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106505204 + 106505205.

It is an arithmetic number, because the mean of its divisors is an integer number (106505205).

Almost surely, 2^213010409 is an apocalyptic number.

It is an amenable number.

213010409 is a deficient number, since it is larger than the sum of its proper divisors (1).

213010409 is an equidigital number, since it uses as much as digits as its factorization.

213010409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 216, while the sum is 20.

The square root of 213010409 is about 14594.8761214339. The cubic root of 213010409 is about 597.2189900733.

The spelling of 213010409 in words is "two hundred thirteen million, ten thousand, four hundred nine".