243859849797 has 4 divisors (see below), whose sum is σ = 325146466400. Its totient is φ = 162573233196.

The previous prime is 243859849781. The next prime is 243859849829. The reversal of 243859849797 is 797948958342.

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 243859849797 - 2⁴ = 243859849781 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 (243859849747) 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, 40643308297 + ... + 40643308302.

It is an arithmetic number, because the mean of its divisors is an integer number (81286616600).

Almost surely, 2^243859849797 is an apocalyptic number.

It is an amenable number.

243859849797 is a deficient number, since it is larger than the sum of its proper divisors (81286616603).

243859849797 is an equidigital number, since it uses as much as digits as its factorization.

243859849797 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81286616602.

The product of its digits is 1097349120, while the sum is 75.

The spelling of 243859849797 in words is "two hundred forty-three billion, eight hundred fifty-nine million, eight hundred forty-nine thousand, seven hundred ninety-seven".