213396809 has 8 divisors (see below), whose sum is σ = 227982240. Its totient is φ = 199146816.

The previous prime is 213396803. The next prime is 213396811. The reversal of 213396809 is 908693312.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 213396809 - 2⁴ = 213396793 is a prime.

It is not an unprimeable number, because it can be changed into a prime (213396803) 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 in 7 ways as a sum of consecutive naturals, for example, 82544 + ... + 85089.

It is an arithmetic number, because the mean of its divisors is an integer number (28497780).

Almost surely, 2^213396809 is an apocalyptic number.

It is an amenable number.

213396809 is a deficient number, since it is larger than the sum of its proper divisors (14585431).

213396809 is a wasteful number, since it uses less digits than its factorization.

213396809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 167719.

The product of its (nonzero) digits is 69984, while the sum is 41.

The square root of 213396809 is about 14608.1076460985. The cubic root of 213396809 is about 597.5798895296.

The spelling of 213396809 in words is "two hundred thirteen million, three hundred ninety-six thousand, eight hundred nine".