1199205668 has 18 divisors (see below), whose sum is σ = 2156871906. Its totient is φ = 583394688.

The previous prime is 1199205659. The next prime is 1199205673. The reversal of 1199205668 is 8665029911.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 947285284 + 251920384 = 30778^2 + 15872^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 104021 + ... + 114972.

It is an arithmetic number, because the mean of its divisors is an integer number (119826217).

Almost surely, 2^1199205668 is an apocalyptic number.

It is an amenable number.

1199205668 is a deficient number, since it is larger than the sum of its proper divisors (957666238).

1199205668 is a wasteful number, since it uses less digits than its factorization.

1199205668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 219071 (or 219032 counting only the distinct ones).

The product of its (nonzero) digits is 233280, while the sum is 47.

The square root of 1199205668 is about 34629.5490585714. The cubic root of 1199205668 is about 1062.4240441757.

The spelling of 1199205668 in words is "one billion, one hundred ninety-nine million, two hundred five thousand, six hundred sixty-eight".