1109999971 has 2 divisors, whose sum is σ = 1109999972. Its totient is φ = 1109999970.

The previous prime is 1109999959. The next prime is 1109999993. The reversal of 1109999971 is 1799999011.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1109999971 - 2⁷ = 1109999843 is a prime.

It is not a weakly prime, because it can be changed into another prime (1109999951) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 554999985 + 554999986.

It is an arithmetic number, because the mean of its divisors is an integer number (554999986).

Almost surely, 2^1109999971 is an apocalyptic number.

1109999971 is a deficient number, since it is larger than the sum of its proper divisors (1).

1109999971 is an equidigital number, since it uses as much as digits as its factorization.

1109999971 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 413343, while the sum is 55.

The square root of 1109999971 is about 33316.6620626977. The cubic root of 1109999971 is about 1035.3987964314.

The spelling of 1109999971 in words is "one billion, one hundred nine million, nine hundred ninety-nine thousand, nine hundred seventy-one".