1181213799 has 16 divisors (see below), whose sum is σ = 1589199360. Its totient is φ = 780373440.

The previous prime is 1181213797. The next prime is 1181213833. The reversal of 1181213799 is 9973121811.

It is not a de Polignac number, because 1181213799 - 2¹ = 1181213797 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1181213799.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1181213797) by changing a digit.

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 in 15 ways as a sum of consecutive naturals, for example, 254994 + ... + 259584.

It is an arithmetic number, because the mean of its divisors is an integer number (99324960).

Almost surely, 2^1181213799 is an apocalyptic number.

1181213799 is a deficient number, since it is larger than the sum of its proper divisors (407985561).

1181213799 is a wasteful number, since it uses less digits than its factorization.

1181213799 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5350.

The product of its digits is 27216, while the sum is 42.

The square root of 1181213799 is about 34368.7910610775. The cubic root of 1181213799 is about 1057.0840110005.

The spelling of 1181213799 in words is "one billion, one hundred eighty-one million, two hundred thirteen thousand, seven hundred ninety-nine".