819738563 has 8 divisors (see below), whose sum is σ = 969149280. Its totient is φ = 678404160.

The previous prime is 819738553. The next prime is 819738599. The reversal of 819738563 is 365837918.

It is a happy number.

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

It is not a de Polignac number, because 819738563 - 2⁸ = 819738307 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (819738553) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2018858 + ... + 2019263.

It is an arithmetic number, because the mean of its divisors is an integer number (121143660).

Almost surely, 2^819738563 is an apocalyptic number.

819738563 is a deficient number, since it is larger than the sum of its proper divisors (149410717).

819738563 is a wasteful number, since it uses less digits than its factorization.

819738563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4038157.

The product of its digits is 1088640, while the sum is 50.

The square root of 819738563 is about 28631.0768746130. The cubic root of 819738563 is about 935.8906791960.

The spelling of 819738563 in words is "eight hundred nineteen million, seven hundred thirty-eight thousand, five hundred sixty-three".