1114561891 has 2 divisors, whose sum is σ = 1114561892. Its totient is φ = 1114561890.

The previous prime is 1114561829. The next prime is 1114562023. The reversal of 1114561891 is 1981654111.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1114561891 - 2¹⁵ = 1114529123 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1114561891.

It is not a weakly prime, because it can be changed into another prime (1114561391) 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 as a sum of consecutive naturals, namely, 557280945 + 557280946.

It is an arithmetic number, because the mean of its divisors is an integer number (557280946).

Almost surely, 2^1114561891 is an apocalyptic number.

1114561891 is a deficient number, since it is larger than the sum of its proper divisors (1).

1114561891 is an equidigital number, since it uses as much as digits as its factorization.

1114561891 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8640, while the sum is 37.

The square root of 1114561891 is about 33385.0549048523. The cubic root of 1114561891 is about 1036.8152980900.

The spelling of 1114561891 in words is "one billion, one hundred fourteen million, five hundred sixty-one thousand, eight hundred ninety-one".