563641394 has 4 divisors (see below), whose sum is σ = 845462094. Its totient is φ = 281820696.

The previous prime is 563641363. The next prime is 563641399. The reversal of 563641394 is 493146365.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 493146365 = 5 ⋅98629273.

It can be written as a sum of positive squares in only one way, i.e., 534210769 + 29430625 = 23113^2 + 5425^2 .

It is not an unprimeable number, because it can be changed into a prime (563641399) 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 as a sum of consecutive naturals, namely, 140910347 + ... + 140910350.

Almost surely, 2^563641394 is an apocalyptic number.

563641394 is a deficient number, since it is larger than the sum of its proper divisors (281820700).

563641394 is a wasteful number, since it uses less digits than its factorization.

563641394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 281820699.

The product of its digits is 233280, while the sum is 41.

The square root of 563641394 is about 23741.1329552741. The cubic root of 563641394 is about 826.0397757308.

The spelling of 563641394 in words is "five hundred sixty-three million, six hundred forty-one thousand, three hundred ninety-four".