243109457 has 8 divisors (see below), whose sum is σ = 245923776. Its totient is φ = 240305392.

The previous prime is 243109453. The next prime is 243109483. The reversal of 243109457 is 754901342.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 243109457 - 2² = 243109453 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (243109453) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 51563 + ... + 56079.

It is an arithmetic number, because the mean of its divisors is an integer number (30740472).

Almost surely, 2^243109457 is an apocalyptic number.

It is an amenable number.

243109457 is a deficient number, since it is larger than the sum of its proper divisors (2814319).

243109457 is a wasteful number, since it uses less digits than its factorization.

243109457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5127.

The product of its (nonzero) digits is 30240, while the sum is 35.

The square root of 243109457 is about 15591.9677077654. The cubic root of 243109457 is about 624.1188282152.

The spelling of 243109457 in words is "two hundred forty-three million, one hundred nine thousand, four hundred fifty-seven".