1099163521 has 8 divisors (see below), whose sum is σ = 1109948840. Its totient is φ = 1088391168.

The previous prime is 1099163519. The next prime is 1099163531. The reversal of 1099163521 is 1253619901.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 286286400 + 812877121 = 16920^2 + 28511^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a 3-Lehmer number, since φ(1099163521) divides (1099163521-1)³.

It is a cyclic number.

It is not a de Polignac number, because 1099163521 - 2¹ = 1099163519 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1099163501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 316225 + ... + 319681.

It is an arithmetic number, because the mean of its divisors is an integer number (138743605).

Almost surely, 2^1099163521 is an apocalyptic number.

It is an amenable number.

1099163521 is a deficient number, since it is larger than the sum of its proper divisors (10785319).

1099163521 is a wasteful number, since it uses less digits than its factorization.

1099163521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6483.

The product of its (nonzero) digits is 14580, while the sum is 37.

The square root of 1099163521 is about 33153.6351098941. The cubic root of 1099163521 is about 1032.0183883033.

The spelling of 1099163521 in words is "one billion, ninety-nine million, one hundred sixty-three thousand, five hundred twenty-one".