1109606399 has 8 divisors (see below), whose sum is σ = 1211438592. Its totient is φ = 1007934040.

The previous prime is 1109606383. The next prime is 1109606461. The reversal of 1109606399 is 9936069011.

It is a happy number.

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 1109606399 - 2⁴ = 1109606383 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1109606369) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25199 + ... + 53424.

It is an arithmetic number, because the mean of its divisors is an integer number (151429824).

Almost surely, 2^1109606399 is an apocalyptic number.

1109606399 is a deficient number, since it is larger than the sum of its proper divisors (101832193).

1109606399 is a wasteful number, since it uses less digits than its factorization.

1109606399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79917.

The product of its (nonzero) digits is 78732, while the sum is 44.

The square root of 1109606399 is about 33310.7550049530. The cubic root of 1109606399 is about 1035.2764083960.

The spelling of 1109606399 in words is "one billion, one hundred nine million, six hundred six thousand, three hundred ninety-nine".