213329609 has 2 divisors, whose sum is σ = 213329610. Its totient is φ = 213329608.

The previous prime is 213329603. The next prime is 213329621. The reversal of 213329609 is 906923312.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 192654400 + 20675209 = 13880^2 + 4547^2 .

It is a cyclic number.

It is not a de Polignac number, because 213329609 - 2⁸ = 213329353 is a prime.

It is not a weakly prime, because it can be changed into another prime (213329603) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106664804 + 106664805.

It is an arithmetic number, because the mean of its divisors is an integer number (106664805).

Almost surely, 2^213329609 is an apocalyptic number.

It is an amenable number.

213329609 is a deficient number, since it is larger than the sum of its proper divisors (1).

213329609 is an equidigital number, since it uses as much as digits as its factorization.

213329609 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 17496, while the sum is 35.

The square root of 213329609 is about 14605.8073724118. The cubic root of 213329609 is about 597.5171557197.

The spelling of 213329609 in words is "two hundred thirteen million, three hundred twenty-nine thousand, six hundred nine".