1188279887 has 2 divisors, whose sum is σ = 1188279888. Its totient is φ = 1188279886.

The previous prime is 1188279881. The next prime is 1188279913. The reversal of 1188279887 is 7889728811.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1188279887 - 2⁴ = 1188279871 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1188279881) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 594139943 + 594139944.

It is an arithmetic number, because the mean of its divisors is an integer number (594139944).

Almost surely, 2^1188279887 is an apocalyptic number.

1188279887 is a deficient number, since it is larger than the sum of its proper divisors (1).

1188279887 is an equidigital number, since it uses as much as digits as its factorization.

1188279887 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3612672, while the sum is 59.

The square root of 1188279887 is about 34471.4358128582. The cubic root of 1188279887 is about 1059.1876673501.

The spelling of 1188279887 in words is "one billion, one hundred eighty-eight million, two hundred seventy-nine thousand, eight hundred eighty-seven".