1120000991 has 2 divisors, whose sum is σ = 1120000992. Its totient is φ = 1120000990.

The previous prime is 1120000927. The next prime is 1120001033. The reversal of 1120000991 is 1990000211.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1120000991 - 2⁶ = 1120000927 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1120002991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 560000495 + 560000496.

It is an arithmetic number, because the mean of its divisors is an integer number (560000496).

Almost surely, 2^1120000991 is an apocalyptic number.

1120000991 is a deficient number, since it is larger than the sum of its proper divisors (1).

1120000991 is an equidigital number, since it uses as much as digits as its factorization.

1120000991 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 162, while the sum is 23.

The square root of 1120000991 is about 33466.4158672541. The cubic root of 1120000991 is about 1038.4991266655.

The spelling of 1120000991 in words is "one billion, one hundred twenty million, nine hundred ninety-one", and thus it is an aban number.