243199787379 has 4 divisors (see below), whose sum is σ = 324266383176. Its totient is φ = 162133191584.

The previous prime is 243199787357. The next prime is 243199787381. The reversal of 243199787379 is 973787991342.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 243199787379 - 2²⁹ = 242662916467 is a prime.

It is a super-2 number, since 2×243199787379² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (243199787279) 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, 40533297894 + ... + 40533297899.

It is an arithmetic number, because the mean of its divisors is an integer number (81066595794).

Almost surely, 2^243199787379 is an apocalyptic number.

243199787379 is a deficient number, since it is larger than the sum of its proper divisors (81066595797).

243199787379 is an equidigital number, since it uses as much as digits as its factorization.

243199787379 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81066595796.

The product of its digits is 144027072, while the sum is 69.

The spelling of 243199787379 in words is "two hundred forty-three billion, one hundred ninety-nine million, seven hundred eighty-seven thousand, three hundred seventy-nine".