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242979289 = 724958761
BaseRepresentation
bin11100111101110…
…01000111011001
3121221012121220221
432132321013121
5444200314124
640035520041
76010201300
oct1636710731
9557177827
10242979289
11115178a33
1269459021
133b454c37
15164e8ce4
hexe7b91d9

242979289 has 6 divisors (see below), whose sum is σ = 282649434. Its totient is φ = 208267920.

The previous prime is 242979281. The next prime is 242979293. The reversal of 242979289 is 982979242.

It can be written as a sum of positive squares in only one way, i.e., 192099600 + 50879689 = 13860^2 + 7133^2 .

It is not a de Polignac number, because 242979289 - 23 = 242979281 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (242979281) 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 5 ways as a sum of consecutive naturals, for example, 2479332 + ... + 2479429.

It is an arithmetic number, because the mean of its divisors is an integer number (47108239).

Almost surely, 2242979289 is an apocalyptic number.

It is an amenable number.

242979289 is a deficient number, since it is larger than the sum of its proper divisors (39670145).

242979289 is an equidigital number, since it uses as much as digits as its factorization.

242979289 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4958775 (or 4958768 counting only the distinct ones).

The product of its digits is 1306368, while the sum is 52.

The square root of 242979289 is about 15587.7929483298. The cubic root of 242979289 is about 624.0074177633.

It can be divided in two parts, 2429 and 79289, that added together give a palindrome (81718).

The spelling of 242979289 in words is "two hundred forty-two million, nine hundred seventy-nine thousand, two hundred eighty-nine".

Divisors: 1 7 49 4958761 34711327 242979289