1199019812 has 6 divisors (see below), whose sum is σ = 2098284678. Its totient is φ = 599509904.

The previous prime is 1199019799. The next prime is 1199019883. The reversal of 1199019812 is 2189109911.

It can be written as a sum of positive squares in only one way, i.e., 889470976 + 309548836 = 29824^2 + 17594^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1199019812.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 149877473 + ... + 149877480.

It is an arithmetic number, because the mean of its divisors is an integer number (349714113).

Almost surely, 2^1199019812 is an apocalyptic number.

It is an amenable number.

1199019812 is a deficient number, since it is larger than the sum of its proper divisors (899264866).

1199019812 is a wasteful number, since it uses less digits than its factorization.

1199019812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 299754957 (or 299754955 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 41.

The square root of 1199019812 is about 34626.8654659933. The cubic root of 1199019812 is about 1062.3691555968.

Subtracting 1199019812 from its reverse (2189109911), we obtain a palindrome (990090099).

The spelling of 1199019812 in words is "one billion, one hundred ninety-nine million, nineteen thousand, eight hundred twelve".