1117989011 has 2 divisors, whose sum is σ = 1117989012. Its totient is φ = 1117989010.

The previous prime is 1117988983. The next prime is 1117989023. The reversal of 1117989011 is 1109897111.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1117989011 - 2¹⁸ = 1117726867 is a prime.

It is not a weakly prime, because it can be changed into another prime (1117989031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 558994505 + 558994506.

It is an arithmetic number, because the mean of its divisors is an integer number (558994506).

Almost surely, 2^1117989011 is an apocalyptic number.

1117989011 is a deficient number, since it is larger than the sum of its proper divisors (1).

1117989011 is an equidigital number, since it uses as much as digits as its factorization.

1117989011 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4536, while the sum is 38.

The square root of 1117989011 is about 33436.3426678218. The cubic root of 1117989011 is about 1037.8768974881.

The spelling of 1117989011 in words is "one billion, one hundred seventeen million, nine hundred eighty-nine thousand, eleven".