243477643 has 4 divisors (see below), whose sum is σ = 243618760. Its totient is φ = 243336528.

The previous prime is 243477617. The next prime is 243477659. The reversal of 243477643 is 346774342.

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 243477643 - 2¹³ = 243469451 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 243477596 and 243477605.

It is not an unprimeable number, because it can be changed into a prime (243447643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 67938 + ... + 71431.

It is an arithmetic number, because the mean of its divisors is an integer number (60904690).

Almost surely, 2^243477643 is an apocalyptic number.

243477643 is a deficient number, since it is larger than the sum of its proper divisors (141117).

243477643 is a wasteful number, since it uses less digits than its factorization.

243477643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 141116.

The product of its digits is 338688, while the sum is 40.

The square root of 243477643 is about 15603.7701533956. The cubic root of 243477643 is about 624.4337424788.

The spelling of 243477643 in words is "two hundred forty-three million, four hundred seventy-seven thousand, six hundred forty-three".