1099799972 has 24 divisors (see below), whose sum is σ = 2056574520. Its totient is φ = 512801280.

The previous prime is 1099799903. The next prime is 1099800007. The reversal of 1099799972 is 2799979901.

It can be written as a sum of positive squares in 4 ways, for example, as 162460516 + 937339456 = 12746^2 + 30616^2 .

It is a super-2 number, since 2×1099799972² = 2419119956822401568, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 66779 + ... + 81602.

It is an arithmetic number, because the mean of its divisors is an integer number (85690605).

Almost surely, 2^1099799972 is an apocalyptic number.

It is an amenable number.

1099799972 is a deficient number, since it is larger than the sum of its proper divisors (956774548).

1099799972 is a wasteful number, since it uses less digits than its factorization.

1099799972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 148511 (or 148509 counting only the distinct ones).

The product of its (nonzero) digits is 5786802, while the sum is 62.

The square root of 1099799972 is about 33163.2322308909. The cubic root of 1099799972 is about 1032.2175404733.

The spelling of 1099799972 in words is "one billion, ninety-nine million, seven hundred ninety-nine thousand, nine hundred seventy-two".