243907822693 has 4 divisors (see below), whose sum is σ = 243936038560. Its totient is φ = 243879606828.

The previous prime is 243907822679. The next prime is 243907822757. The reversal of 243907822693 is 396228709342.

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 a cyclic number.

It is not a de Polignac number, because 243907822693 - 2³³ = 235317888101 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 (243907822633) 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, 14094963 + ... + 14112256.

It is an arithmetic number, because the mean of its divisors is an integer number (60984009640).

Almost surely, 2^243907822693 is an apocalyptic number.

It is an amenable number.

243907822693 is a deficient number, since it is larger than the sum of its proper divisors (28215867).

243907822693 is an equidigital number, since it uses as much as digits as its factorization.

243907822693 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28215866.

The product of its (nonzero) digits is 7838208, while the sum is 55.

The spelling of 243907822693 in words is "two hundred forty-three billion, nine hundred seven million, eight hundred twenty-two thousand, six hundred ninety-three".