1979505563 has 8 divisors (see below), whose sum is σ = 2262978528. Its totient is φ = 1696204224.

The previous prime is 1979505497. The next prime is 1979505613. The reversal of 1979505563 is 3655059791.

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

It is a cyclic number.

It is not a de Polignac number, because 1979505563 - 2¹⁰ = 1979504539 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1979505763) 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, 17156 + ... + 65217.

It is an arithmetic number, because the mean of its divisors is an integer number (282872316).

Almost surely, 2^1979505563 is an apocalyptic number.

1979505563 is a deficient number, since it is larger than the sum of its proper divisors (283472965).

1979505563 is an equidigital number, since it uses as much as digits as its factorization.

1979505563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85813.

The product of its (nonzero) digits is 1275750, while the sum is 50.

The square root of 1979505563 is about 44491.6347530634. The cubic root of 1979505563 is about 1255.6027036901.

The spelling of 1979505563 in words is "one billion, nine hundred seventy-nine million, five hundred five thousand, five hundred sixty-three".