1283779563 has 16 divisors (see below), whose sum is σ = 1895189376. Its totient is φ = 766434240.

The previous prime is 1283779559. The next prime is 1283779583. The reversal of 1283779563 is 3659773821.

It is not a de Polignac number, because 1283779563 - 2² = 1283779559 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1283779583) 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 in 15 ways as a sum of consecutive naturals, for example, 288106 + ... + 292527.

It is an arithmetic number, because the mean of its divisors is an integer number (118449336).

Almost surely, 2^1283779563 is an apocalyptic number.

1283779563 is a deficient number, since it is larger than the sum of its proper divisors (611409813).

1283779563 is a wasteful number, since it uses less digits than its factorization.

1283779563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 580714.

The product of its digits is 1905120, while the sum is 51.

The square root of 1283779563 is about 35829.8697039216. The cubic root of 1283779563 is about 1086.8346748754.

The spelling of 1283779563 in words is "one billion, two hundred eighty-three million, seven hundred seventy-nine thousand, five hundred sixty-three".