1127587891 has 2 divisors, whose sum is σ = 1127587892. Its totient is φ = 1127587890.

The previous prime is 1127587873. The next prime is 1127587897. The reversal of 1127587891 is 1987857211.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1127587891 - 2⁵ = 1127587859 is a prime.

It is not a weakly prime, because it can be changed into another prime (1127587897) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 563793945 + 563793946.

It is an arithmetic number, because the mean of its divisors is an integer number (563793946).

Almost surely, 2^1127587891 is an apocalyptic number.

1127587891 is a deficient number, since it is larger than the sum of its proper divisors (1).

1127587891 is an equidigital number, since it uses as much as digits as its factorization.

1127587891 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 282240, while the sum is 49.

The square root of 1127587891 is about 33579.5755035706. The cubic root of 1127587891 is about 1040.8387867642.

The spelling of 1127587891 in words is "one billion, one hundred twenty-seven million, five hundred eighty-seven thousand, eight hundred ninety-one".