1139965563 has 32 divisors (see below), whose sum is σ = 1695803904. Its totient is φ = 680988000.

The previous prime is 1139965559. The next prime is 1139965571. The reversal of 1139965563 is 3655699311.

It is not a de Polignac number, because 1139965563 - 2² = 1139965559 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1139965513) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 281493 + ... + 285513.

It is an arithmetic number, because the mean of its divisors is an integer number (52993872).

Almost surely, 2^1139965563 is an apocalyptic number.

1139965563 is a deficient number, since it is larger than the sum of its proper divisors (555838341).

1139965563 is an equidigital number, since it uses as much as digits as its factorization.

1139965563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4128 (or 4106 counting only the distinct ones).

The product of its digits is 656100, while the sum is 48.

The square root of 1139965563 is about 33763.3760604594. The cubic root of 1139965563 is about 1044.6334078851.

The spelling of 1139965563 in words is "one billion, one hundred thirty-nine million, nine hundred sixty-five thousand, five hundred sixty-three".