243872749 has 8 divisors (see below), whose sum is σ = 255036672. Its totient is φ = 232755600.

The previous prime is 243872747. The next prime is 243872767. The reversal of 243872749 is 947278342.

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 243872749 - 2¹ = 243872747 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 243872699 and 243872708.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243872743) 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, 802 + ... + 22099.

It is an arithmetic number, because the mean of its divisors is an integer number (31879584).

Almost surely, 2^243872749 is an apocalyptic number.

It is an amenable number.

243872749 is a deficient number, since it is larger than the sum of its proper divisors (11163923).

243872749 is a wasteful number, since it uses less digits than its factorization.

243872749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23387.

The product of its digits is 677376, while the sum is 46.

The square root of 243872749 is about 15616.4256153577. The cubic root of 243872749 is about 624.7713288254.

The spelling of 243872749 in words is "two hundred forty-three million, eight hundred seventy-two thousand, seven hundred forty-nine".