1108689745 has 4 divisors (see below), whose sum is σ = 1330427700. Its totient is φ = 886951792.

The previous prime is 1108689737. The next prime is 1108689761. The reversal of 1108689745 is 5479868011.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 861539904 + 247149841 = 29352^2 + 15721^2 .

It is a cyclic number.

It is not a de Polignac number, because 1108689745 - 2³ = 1108689737 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 110868970 + ... + 110868979.

It is an arithmetic number, because the mean of its divisors is an integer number (332606925).

Almost surely, 2^1108689745 is an apocalyptic number.

It is an amenable number.

1108689745 is a deficient number, since it is larger than the sum of its proper divisors (221737955).

1108689745 is an equidigital number, since it uses as much as digits as its factorization.

1108689745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 221737954.

The product of its (nonzero) digits is 483840, while the sum is 49.

The square root of 1108689745 is about 33296.9930324046. The cubic root of 1108689745 is about 1034.9912467073.

The spelling of 1108689745 in words is "one billion, one hundred eight million, six hundred eighty-nine thousand, seven hundred forty-five".