1109429999 has 4 divisors (see below), whose sum is σ = 1109522136. Its totient is φ = 1109337864.

The previous prime is 1109429987. The next prime is 1109430017. The reversal of 1109429999 is 9999249011.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 9999249011 = 23 ⋅434749957.

It is a cyclic number.

It is not a de Polignac number, because 1109429999 - 2²⁰ = 1108381423 is a prime.

It is a super-2 number, since 2×1109429999² = 2461669845362280002, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1109429999.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1109429929) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24704 + ... + 53189.

It is an arithmetic number, because the mean of its divisors is an integer number (277380534).

Almost surely, 2^1109429999 is an apocalyptic number.

1109429999 is a deficient number, since it is larger than the sum of its proper divisors (92137).

1109429999 is an equidigital number, since it uses as much as digits as its factorization.

1109429999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92136.

The product of its (nonzero) digits is 472392, while the sum is 53.

The square root of 1109429999 is about 33308.1071062287. The cubic root of 1109429999 is about 1035.2215443658.

The spelling of 1109429999 in words is "one billion, one hundred nine million, four hundred twenty-nine thousand, nine hundred ninety-nine".