1099494871 has 4 divisors (see below), whose sum is σ = 1109770632. Its totient is φ = 1089219112.

The previous prime is 1099494863. The next prime is 1099494889. The reversal of 1099494871 is 1784949901.

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

It is a cyclic number.

It is not a de Polignac number, because 1099494871 - 2³ = 1099494863 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 (1099494811) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5137720 + ... + 5137933.

It is an arithmetic number, because the mean of its divisors is an integer number (277442658).

Almost surely, 2^1099494871 is an apocalyptic number.

1099494871 is a deficient number, since it is larger than the sum of its proper divisors (10275761).

1099494871 is a wasteful number, since it uses less digits than its factorization.

1099494871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10275760.

The product of its (nonzero) digits is 653184, while the sum is 52.

The square root of 1099494871 is about 33158.6319229247. The cubic root of 1099494871 is about 1032.1220807720.

The spelling of 1099494871 in words is "one billion, ninety-nine million, four hundred ninety-four thousand, eight hundred seventy-one".