1109642905 has 32 divisors (see below), whose sum is σ = 1537344000. Its totient is φ = 753172992.

The previous prime is 1109642899. The next prime is 1109642909. The reversal of 1109642905 is 5092469011.

It is a cyclic number.

It is not a de Polignac number, because 1109642905 - 2²⁷ = 975425177 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1109642909) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2179791 + ... + 2180299.

It is an arithmetic number, because the mean of its divisors is an integer number (48042000).

Almost surely, 2^1109642905 is an apocalyptic number.

It is an amenable number.

1109642905 is a deficient number, since it is larger than the sum of its proper divisors (427701095).

1109642905 is a wasteful number, since it uses less digits than its factorization.

1109642905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1033.

The product of its (nonzero) digits is 19440, while the sum is 37.

The square root of 1109642905 is about 33311.3029616075. The cubic root of 1109642905 is about 1035.2877617870.

The spelling of 1109642905 in words is "one billion, one hundred nine million, six hundred forty-two thousand, nine hundred five".