242728723 has 4 divisors (see below), whose sum is σ = 246053848. Its totient is φ = 239403600.

The previous prime is 242728709. The next prime is 242728747. The reversal of 242728723 is 327827242.

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 242728723 - 2⁵ = 242728691 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (242728793) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1662453 + ... + 1662598.

It is an arithmetic number, because the mean of its divisors is an integer number (61513462).

Almost surely, 2^242728723 is an apocalyptic number.

242728723 is a deficient number, since it is larger than the sum of its proper divisors (3325125).

242728723 is an equidigital number, since it uses as much as digits as its factorization.

242728723 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3325124.

The product of its digits is 75264, while the sum is 37.

The square root of 242728723 is about 15579.7536244961. The cubic root of 242728723 is about 623.7928469114.

The spelling of 242728723 in words is "two hundred forty-two million, seven hundred twenty-eight thousand, seven hundred twenty-three".