1100243089 has 16 divisors (see below), whose sum is σ = 1264538880. Its totient is φ = 946751760.

The previous prime is 1100243047. The next prime is 1100243099. The reversal of 1100243089 is 9803420011.

It is a happy number.

It is not a de Polignac number, because 1100243089 - 2¹⁹ = 1099718801 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1100243099) 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, 467614 + ... + 469960.

It is an arithmetic number, because the mean of its divisors is an integer number (79033680).

Almost surely, 2^1100243089 is an apocalyptic number.

1100243089 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

1100243089 is a deficient number, since it is larger than the sum of its proper divisors (164295791).

1100243089 is a wasteful number, since it uses less digits than its factorization.

1100243089 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4620.

The product of its (nonzero) digits is 1728, while the sum is 28.

The square root of 1100243089 is about 33169.9124056727. The cubic root of 1100243089 is about 1032.3561510498.

The spelling of 1100243089 in words is "one billion, one hundred million, two hundred forty-three thousand, eighty-nine".