1109142399 has 8 divisors (see below), whose sum is σ = 1479512320. Its totient is φ = 739100376.

The previous prime is 1109142343. The next prime is 1109142421. The reversal of 1109142399 is 9932419011.

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

It is not a de Polignac number, because 1109142399 - 2¹³ = 1109134207 is a prime.

It is a super-2 number, since 2×1109142399² = 2460393722518950402, 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 (1109132399) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 73969 + ... + 87690.

It is an arithmetic number, because the mean of its divisors is an integer number (184939040).

Almost surely, 2^1109142399 is an apocalyptic number.

1109142399 is a deficient number, since it is larger than the sum of its proper divisors (370369921).

1109142399 is a wasteful number, since it uses less digits than its factorization.

1109142399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163949.

The product of its (nonzero) digits is 17496, while the sum is 39.

The square root of 1109142399 is about 33303.7895591478. The cubic root of 1109142399 is about 1035.1320823757.

The spelling of 1109142399 in words is "one billion, one hundred nine million, one hundred forty-two thousand, three hundred ninety-nine".