213736394 has 8 divisors (see below), whose sum is σ = 321498720. Its totient is φ = 106570156.

The previous prime is 213736381. The next prime is 213736399. The reversal of 213736394 is 493637312.

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

It is a super-2 number, since 2×213736394² = 91366492240246472, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (213736399) 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 in 3 ways as a sum of consecutive naturals, for example, 148124 + ... + 149559.

It is an arithmetic number, because the mean of its divisors is an integer number (40187340).

Almost surely, 2^213736394 is an apocalyptic number.

213736394 is a deficient number, since it is larger than the sum of its proper divisors (107762326).

213736394 is a wasteful number, since it uses less digits than its factorization.

213736394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 298044.

The product of its digits is 81648, while the sum is 38.

The square root of 213736394 is about 14619.7261944265. The cubic root of 213736394 is about 597.8967040442.

The spelling of 213736394 in words is "two hundred thirteen million, seven hundred thirty-six thousand, three hundred ninety-four".