242749873 has 2 divisors, whose sum is σ = 242749874. Its totient is φ = 242749872.

The previous prime is 242749853. The next prime is 242749891. The reversal of 242749873 is 378947242.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 240653169 + 2096704 = 15513^2 + 1448^2 .

It is a cyclic number.

It is not a de Polignac number, because 242749873 - 2⁵ = 242749841 is a prime.

It is a super-2 number, since 2×242749873² = 117855001683032258, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (242749813) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121374936 + 121374937.

It is an arithmetic number, because the mean of its divisors is an integer number (121374937).

Almost surely, 2^242749873 is an apocalyptic number.

It is an amenable number.

242749873 is a deficient number, since it is larger than the sum of its proper divisors (1).

242749873 is an equidigital number, since it uses as much as digits as its factorization.

242749873 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 677376, while the sum is 46.

The square root of 242749873 is about 15580.4323752584. The cubic root of 242749873 is about 623.8109643051.

The spelling of 242749873 in words is "two hundred forty-two million, seven hundred forty-nine thousand, eight hundred seventy-three".