213663794 has 4 divisors (see below), whose sum is σ = 320495694. Its totient is φ = 106831896.

The previous prime is 213663781. The next prime is 213663799. The reversal of 213663794 is 497366312.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 207734569 + 5929225 = 14413^2 + 2435^2 .

It is not an unprimeable number, because it can be changed into a prime (213663799) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 53415947 + ... + 53415950.

Almost surely, 2^213663794 is an apocalyptic number.

213663794 is a deficient number, since it is larger than the sum of its proper divisors (106831900).

213663794 is a wasteful number, since it uses less digits than its factorization.

213663794 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106831899.

The product of its digits is 163296, while the sum is 41.

The square root of 213663794 is about 14617.2430369068. The cubic root of 213663794 is about 597.8290003718.

The spelling of 213663794 in words is "two hundred thirteen million, six hundred sixty-three thousand, seven hundred ninety-four".