1099840553 has 16 divisors (see below), whose sum is σ = 1293000576. Its totient is φ = 916064640.

The previous prime is 1099840549. The next prime is 1099840591. The reversal of 1099840553 is 3550489901.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 1099840553 - 2² = 1099840549 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1099840523) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19925 + ... + 50957.

It is an arithmetic number, because the mean of its divisors is an integer number (80812536).

Almost surely, 2^1099840553 is an apocalyptic number.

It is an amenable number.

1099840553 is a deficient number, since it is larger than the sum of its proper divisors (193160023).

1099840553 is an equidigital number, since it uses as much as digits as its factorization.

1099840553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31184.

The product of its (nonzero) digits is 194400, while the sum is 44.

The square root of 1099840553 is about 33163.8440624726. The cubic root of 1099840553 is about 1032.2302360864.

The spelling of 1099840553 in words is "one billion, ninety-nine million, eight hundred forty thousand, five hundred fifty-three".