243398579423 has 4 divisors (see below), whose sum is σ = 243399573240. Its totient is φ = 243397585608.

The previous prime is 243398579419. The next prime is 243398579429. The reversal of 243398579423 is 324975893342.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 243398579423 - 2² = 243398579419 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243398579429) 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, 159473 + ... + 715701.

It is an arithmetic number, because the mean of its divisors is an integer number (60849893310).

Almost surely, 2^243398579423 is an apocalyptic number.

243398579423 is a deficient number, since it is larger than the sum of its proper divisors (993817).

243398579423 is an equidigital number, since it uses as much as digits as its factorization.

243398579423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 993816.

The product of its digits is 39191040, while the sum is 59.

The spelling of 243398579423 in words is "two hundred forty-three billion, three hundred ninety-eight million, five hundred seventy-nine thousand, four hundred twenty-three".