321663434 has 8 divisors (see below), whose sum is σ = 482593188. Its totient is φ = 160799040.

The previous prime is 321663421. The next prime is 321663439. The reversal of 321663434 is 434366123.

It can be written as a sum of positive squares in 2 ways, for example, as 265787809 + 55875625 = 16303^2 + 7475^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 321663434.

It is not an unprimeable number, because it can be changed into a prime (321663439) 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 3 ways as a sum of consecutive naturals, for example, 1247 + ... + 25394.

Almost surely, 2^321663434 is an apocalyptic number.

321663434 is a deficient number, since it is larger than the sum of its proper divisors (160929754).

321663434 is a wasteful number, since it uses less digits than its factorization.

321663434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32680.

The product of its digits is 31104, while the sum is 32.

The square root of 321663434 is about 17934.9779481325. The cubic root of 321663434 is about 685.1735110212.

The spelling of 321663434 in words is "three hundred twenty-one million, six hundred sixty-three thousand, four hundred thirty-four".