243404123433299 has 4 divisors (see below), whose sum is σ = 251797369068960. Its totient is φ = 235010877797640.

The previous prime is 243404123433221. The next prime is 243404123433337. The reversal of 243404123433299 is 992334321404342.

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 243404123433299 - 2²⁰ = 243404122384723 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 243404123433299.

It is not an unprimeable number, because it can be changed into a prime (243404123435299) 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, 4196622817787 + ... + 4196622817844.

It is an arithmetic number, because the mean of its divisors is an integer number (62949342267240).

Almost surely, 2^{243404123433299} is an apocalyptic number.

243404123433299 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

243404123433299 is a deficient number, since it is larger than the sum of its proper divisors (8393245635661).

243404123433299 is an equidigital number, since it uses as much as digits as its factorization.

243404123433299 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8393245635660.

The product of its (nonzero) digits is 13436928, while the sum is 53.

The spelling of 243404123433299 in words is "two hundred forty-three trillion, four hundred four billion, one hundred twenty-three million, four hundred thirty-three thousand, two hundred ninety-nine".