1108999641 has 12 divisors (see below), whose sum is σ = 1570764272. Its totient is φ = 695842368.

The previous prime is 1108999637. The next prime is 1108999649. The reversal of 1108999641 is 1469998011.

It is a happy number.

It is not a de Polignac number, because 1108999641 - 2² = 1108999637 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1108999649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 638695 + ... + 640428.

Almost surely, 2^1108999641 is an apocalyptic number.

It is an amenable number.

1108999641 is a deficient number, since it is larger than the sum of its proper divisors (461764631).

1108999641 is a wasteful number, since it uses less digits than its factorization.

1108999641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1279160 (or 1279143 counting only the distinct ones).

The product of its (nonzero) digits is 139968, while the sum is 48.

The square root of 1108999641 is about 33301.6462205699. The cubic root of 1108999641 is about 1035.0876697657.

The spelling of 1108999641 in words is "one billion, one hundred eight million, nine hundred ninety-nine thousand, six hundred forty-one".