1125683891 has 2 divisors, whose sum is σ = 1125683892. Its totient is φ = 1125683890.

The previous prime is 1125683869. The next prime is 1125683939. The reversal of 1125683891 is 1983865211.

It is a weak prime.

It is an emirp because it is prime and its reverse (1983865211) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1125683891 - 2⁶ = 1125683827 is a prime.

It is not a weakly prime, because it can be changed into another prime (1125683491) 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, 562841945 + 562841946.

It is an arithmetic number, because the mean of its divisors is an integer number (562841946).

Almost surely, 2^1125683891 is an apocalyptic number.

1125683891 is a deficient number, since it is larger than the sum of its proper divisors (1).

1125683891 is an equidigital number, since it uses as much as digits as its factorization.

1125683891 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 103680, while the sum is 44.

The square root of 1125683891 is about 33551.2129586994. The cubic root of 1125683891 is about 1040.2526170734.

The spelling of 1125683891 in words is "one billion, one hundred twenty-five million, six hundred eighty-three thousand, eight hundred ninety-one".