243936479 has 4 divisors (see below), whose sum is σ = 244374984. Its totient is φ = 243497976.

The previous prime is 243936431. The next prime is 243936491. The reversal of 243936479 is 974639342.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 243936479 - 2¹⁶ = 243870943 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 (243936409) 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, 218417 + ... + 219530.

It is an arithmetic number, because the mean of its divisors is an integer number (61093746).

Almost surely, 2^243936479 is an apocalyptic number.

243936479 is a deficient number, since it is larger than the sum of its proper divisors (438505).

243936479 is an equidigital number, since it uses as much as digits as its factorization.

243936479 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 438504.

The product of its digits is 979776, while the sum is 47.

The square root of 243936479 is about 15618.4659618030. The cubic root of 243936479 is about 624.8257468352.

The spelling of 243936479 in words is "two hundred forty-three million, nine hundred thirty-six thousand, four hundred seventy-nine".