242709977 has 2 divisors, whose sum is σ = 242709978. Its totient is φ = 242709976.

The previous prime is 242709967. The next prime is 242709983. The reversal of 242709977 is 779907242.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 169624576 + 73085401 = 13024^2 + 8549^2 .

It is a cyclic number.

It is not a de Polignac number, because 242709977 - 2⁶ = 242709913 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (242709947) 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 as a sum of consecutive naturals, namely, 121354988 + 121354989.

It is an arithmetic number, because the mean of its divisors is an integer number (121354989).

Almost surely, 2^242709977 is an apocalyptic number.

It is an amenable number.

242709977 is a deficient number, since it is larger than the sum of its proper divisors (1).

242709977 is an equidigital number, since it uses as much as digits as its factorization.

242709977 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 444528, while the sum is 47.

The square root of 242709977 is about 15579.1519987450. The cubic root of 242709977 is about 623.7767879387.

The spelling of 242709977 in words is "two hundred forty-two million, seven hundred nine thousand, nine hundred seventy-seven".