1979238563 has 2 divisors, whose sum is σ = 1979238564. Its totient is φ = 1979238562.

The previous prime is 1979238559. The next prime is 1979238577. The reversal of 1979238563 is 3658329791.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1979238563 - 2² = 1979238559 is a prime.

It is not a weakly prime, because it can be changed into another prime (1979238533) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 989619281 + 989619282.

It is an arithmetic number, because the mean of its divisors is an integer number (989619282).

Almost surely, 2^1979238563 is an apocalyptic number.

1979238563 is a deficient number, since it is larger than the sum of its proper divisors (1).

1979238563 is an equidigital number, since it uses as much as digits as its factorization.

1979238563 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2449440, while the sum is 53.

The square root of 1979238563 is about 44488.6340878207. The cubic root of 1979238563 is about 1255.5462483472.

The spelling of 1979238563 in words is "one billion, nine hundred seventy-nine million, two hundred thirty-eight thousand, five hundred sixty-three".