1110439991 has 2 divisors, whose sum is σ = 1110439992. Its totient is φ = 1110439990.

The previous prime is 1110439987. The next prime is 1110440029. The reversal of 1110439991 is 1999340111.

It is an a-pointer prime, because the next prime (1110440029) can be obtained adding 1110439991 to its sum of digits (38).

It is a weak prime.

It is an emirp because it is prime and its reverse (1999340111) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1110439991 - 2² = 1110439987 is a prime.

It is a super-2 number, since 2×1110439991² = 2466153947224160162, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1110439921) 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, 555219995 + 555219996.

It is an arithmetic number, because the mean of its divisors is an integer number (555219996).

Almost surely, 2^1110439991 is an apocalyptic number.

1110439991 is a deficient number, since it is larger than the sum of its proper divisors (1).

1110439991 is an equidigital number, since it uses as much as digits as its factorization.

1110439991 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8748, while the sum is 38.

The square root of 1110439991 is about 33323.2650111000. The cubic root of 1110439991 is about 1035.5355940296.

The spelling of 1110439991 in words is "one billion, one hundred ten million, four hundred thirty-nine thousand, nine hundred ninety-one".