1109552399 has 4 divisors (see below), whose sum is σ = 1110924720. Its totient is φ = 1108180080.

The previous prime is 1109552357. The next prime is 1109552401. The reversal of 1109552399 is 9932559011.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9932559011 = 631 ⋅15740981.

It is a cyclic number.

It is not a de Polignac number, because 1109552399 - 2¹⁶ = 1109486863 is a prime.

It is a super-2 number, since 2×1109552399² = 2462213052253310402, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1109552309) 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 3 ways as a sum of consecutive naturals, for example, 684947 + ... + 686564.

It is an arithmetic number, because the mean of its divisors is an integer number (277731180).

Almost surely, 2^1109552399 is an apocalyptic number.

1109552399 is a deficient number, since it is larger than the sum of its proper divisors (1372321).

1109552399 is an equidigital number, since it uses as much as digits as its factorization.

1109552399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1372320.

The product of its (nonzero) digits is 109350, while the sum is 44.

The square root of 1109552399 is about 33309.9444460660. The cubic root of 1109552399 is about 1035.2596139023.

The spelling of 1109552399 in words is "one billion, one hundred nine million, five hundred fifty-two thousand, three hundred ninety-nine".