1199078706909 has 4 divisors (see below), whose sum is σ = 1598771609216. Its totient is φ = 799385804604.

The previous prime is 1199078706907. The next prime is 1199078706923. The reversal of 1199078706909 is 9096078709911.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 1199078706909 - 2¹ = 1199078706907 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1199078706909.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1199078706907) 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, 199846451149 + ... + 199846451154.

It is an arithmetic number, because the mean of its divisors is an integer number (399692902304).

Almost surely, 2^{1199078706909} is an apocalyptic number.

It is an amenable number.

1199078706909 is a deficient number, since it is larger than the sum of its proper divisors (399692902307).

1199078706909 is an equidigital number, since it uses as much as digits as its factorization.

1199078706909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 399692902306.

The product of its (nonzero) digits is 15431472, while the sum is 66.

The spelling of 1199078706909 in words is "one trillion, one hundred ninety-nine billion, seventy-eight million, seven hundred six thousand, nine hundred nine".