242897771 has 4 divisors (see below), whose sum is σ = 243283344. Its totient is φ = 242512200.

The previous prime is 242897747. The next prime is 242897789. The reversal of 242897771 is 177798242.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 177798242 = 2 ⋅88899121.

It is a cyclic number.

It is not a de Polignac number, because 242897771 - 2¹⁰ = 242896747 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (242897371) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 191840 + ... + 193101.

It is an arithmetic number, because the mean of its divisors is an integer number (60820836).

Almost surely, 2^242897771 is an apocalyptic number.

242897771 is a deficient number, since it is larger than the sum of its proper divisors (385573).

242897771 is an equidigital number, since it uses as much as digits as its factorization.

242897771 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 385572.

The product of its digits is 395136, while the sum is 47.

The square root of 242897771 is about 15585.1779264787. The cubic root of 242897771 is about 623.9376264564.

The spelling of 242897771 in words is "two hundred forty-two million, eight hundred ninety-seven thousand, seven hundred seventy-one".