1187628663 has 16 divisors (see below), whose sum is σ = 1714849920. Its totient is φ = 726761184.

The previous prime is 1187628623. The next prime is 1187628679. The reversal of 1187628663 is 3668267811.

It is not a de Polignac number, because 1187628663 - 2¹² = 1187624567 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1187628613) 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, 78081 + ... + 92042.

It is an arithmetic number, because the mean of its divisors is an integer number (107178120).

Almost surely, 2^1187628663 is an apocalyptic number.

1187628663 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1187628663 is a deficient number, since it is larger than the sum of its proper divisors (527221257).

1187628663 is a wasteful number, since it uses less digits than its factorization.

1187628663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 170318.

The product of its digits is 580608, while the sum is 48.

The square root of 1187628663 is about 34461.9886686767. The cubic root of 1187628663 is about 1058.9941398594.

The spelling of 1187628663 in words is "one billion, one hundred eighty-seven million, six hundred twenty-eight thousand, six hundred sixty-three".