1123091553 has 8 divisors (see below), whose sum is σ = 1585541088. Its totient is φ = 704684864.

The previous prime is 1123091551. The next prime is 1123091647. The reversal of 1123091553 is 3551903211.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1123091553 - 2¹ = 1123091551 is a prime.

It is a super-2 number, since 2×1123091553² = 2522669272839903618, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1123091553.

It is not an unprimeable number, because it can be changed into a prime (1123091551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11010651 + ... + 11010752.

It is an arithmetic number, because the mean of its divisors is an integer number (198192636).

Almost surely, 2^1123091553 is an apocalyptic number.

It is an amenable number.

1123091553 is a deficient number, since it is larger than the sum of its proper divisors (462449535).

1123091553 is a wasteful number, since it uses less digits than its factorization.

1123091553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22021423.

The product of its (nonzero) digits is 4050, while the sum is 30.

The square root of 1123091553 is about 33512.5581387038. The cubic root of 1123091553 is about 1039.4534705488.

Adding to 1123091553 its reverse (3551903211), we get a palindrome (4674994764).

The spelling of 1123091553 in words is "one billion, one hundred twenty-three million, ninety-one thousand, five hundred fifty-three".