243979461 has 24 divisors (see below), whose sum is σ = 407070144. Its totient is φ = 139167360.

The previous prime is 243979459. The next prime is 243979471. The reversal of 243979461 is 164979342.

It is a happy number.

243979461 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 243979461 - 2¹ = 243979459 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243979441) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 70801 + ... + 74166.

It is an arithmetic number, because the mean of its divisors is an integer number (16961256).

Almost surely, 2^243979461 is an apocalyptic number.

It is an amenable number.

243979461 is a deficient number, since it is larger than the sum of its proper divisors (163090683).

243979461 is a wasteful number, since it uses less digits than its factorization.

243979461 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145001 (or 144998 counting only the distinct ones).

The product of its digits is 326592, while the sum is 45.

The square root of 243979461 is about 15619.8419006083. The cubic root of 243979461 is about 624.8624431139.

The spelling of 243979461 in words is "two hundred forty-three million, nine hundred seventy-nine thousand, four hundred sixty-one".