242663879 has 2 divisors, whose sum is σ = 242663880. Its totient is φ = 242663878.

The previous prime is 242663857. The next prime is 242663881. The reversal of 242663879 is 978366242.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 242663879 - 2²⁴ = 225886663 is a prime.

Together with 242663881, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (242663779) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121331939 + 121331940.

It is an arithmetic number, because the mean of its divisors is an integer number (121331940).

Almost surely, 2^242663879 is an apocalyptic number.

242663879 is a deficient number, since it is larger than the sum of its proper divisors (1).

242663879 is an equidigital number, since it uses as much as digits as its factorization.

242663879 is an evil number, because the sum of its binary digits is even.

The product of its digits is 870912, while the sum is 47.

The square root of 242663879 is about 15577.6724513003. The cubic root of 242663879 is about 623.7372940492.

The spelling of 242663879 in words is "two hundred forty-two million, six hundred sixty-three thousand, eight hundred seventy-nine".