242728747 has 2 divisors, whose sum is σ = 242728748. Its totient is φ = 242728746.

The previous prime is 242728709. The next prime is 242728757. The reversal of 242728747 is 747827242.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-242728747 is a prime.

It is not a weakly prime, because it can be changed into another prime (242728757) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121364373 + 121364374.

It is an arithmetic number, because the mean of its divisors is an integer number (121364374).

Almost surely, 2^242728747 is an apocalyptic number.

242728747 is a deficient number, since it is larger than the sum of its proper divisors (1).

242728747 is an equidigital number, since it uses as much as digits as its factorization.

242728747 is an evil number, because the sum of its binary digits is even.

The product of its digits is 351232, while the sum is 43.

The square root of 242728747 is about 15579.7543947265. The cubic root of 242728747 is about 623.7928674707.

The spelling of 242728747 in words is "two hundred forty-two million, seven hundred twenty-eight thousand, seven hundred forty-seven".