1109101987 has 16 divisors (see below), whose sum is σ = 1289410560. Its totient is φ = 934325568.

The previous prime is 1109101969. The next prime is 1109101993. The reversal of 1109101987 is 7891019011.

It is a cyclic number.

It is not a de Polignac number, because 1109101987 - 2¹⁹ = 1108577699 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1109101927) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 222183 + ... + 227119.

It is an arithmetic number, because the mean of its divisors is an integer number (80588160).

Almost surely, 2^1109101987 is an apocalyptic number.

1109101987 is a deficient number, since it is larger than the sum of its proper divisors (180308573).

1109101987 is an equidigital number, since it uses as much as digits as its factorization.

1109101987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5490.

The product of its (nonzero) digits is 4536, while the sum is 37.

The square root of 1109101987 is about 33303.1828358792. The cubic root of 1109101987 is about 1035.1195104204.

The spelling of 1109101987 in words is "one billion, one hundred nine million, one hundred one thousand, nine hundred eighty-seven".