659381563 has 4 divisors (see below), whose sum is σ = 680651968. Its totient is φ = 638111160.

The previous prime is 659381539. The next prime is 659381573. The reversal of 659381563 is 365183956.

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

It is a cyclic number.

It is not a de Polignac number, because 659381563 - 2⁵ = 659381531 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (659381573) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10635156 + ... + 10635217.

It is an arithmetic number, because the mean of its divisors is an integer number (170162992).

Almost surely, 2^659381563 is an apocalyptic number.

659381563 is a deficient number, since it is larger than the sum of its proper divisors (21270405).

659381563 is a wasteful number, since it uses less digits than its factorization.

659381563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21270404.

The product of its digits is 583200, while the sum is 46.

The square root of 659381563 is about 25678.4260226362. The cubic root of 659381563 is about 870.3867409029.

The spelling of 659381563 in words is "six hundred fifty-nine million, three hundred eighty-one thousand, five hundred sixty-three".