243725823 has 36 divisors (see below), whose sum is σ = 391998880. Its totient is φ = 145791360.

The previous prime is 243725809. The next prime is 243725837. The reversal of 243725823 is 328527342.

243725823 is a `hidden beast` number, since 2 + 4 + 3 + 72 + 582 + 3 = 666.

It is an interprime number because it is at equal distance from previous prime (243725809) and next prime (243725837).

It is not a de Polignac number, because 243725823 - 2¹⁴ = 243709439 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 (243725123) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 84615 + ... + 87447.

Almost surely, 2^243725823 is an apocalyptic number.

243725823 is a deficient number, since it is larger than the sum of its proper divisors (148273057).

243725823 is a wasteful number, since it uses less digits than its factorization.

243725823 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2940 (or 2926 counting only the distinct ones).

The product of its digits is 80640, while the sum is 36.

The square root of 243725823 is about 15611.7206931203. The cubic root of 243725823 is about 624.6458349720.

The spelling of 243725823 in words is "two hundred forty-three million, seven hundred twenty-five thousand, eight hundred twenty-three".