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4209544121 is a prime number
BaseRepresentation
bin1111101011101000…
…1000101110111001
3101212100222222221112
43322322020232321
532110120402441
61533413050105
7206213351246
oct37272105671
911770888845
104209544121
1118701a5892
12995926935
1352116ac13
142bd0dc5cd
151998674eb
hexfae88bb9

4209544121 has 2 divisors, whose sum is σ = 4209544122. Its totient is φ = 4209544120.

The previous prime is 4209544109. The next prime is 4209544153. The reversal of 4209544121 is 1214459024.

It is an a-pointer prime, because the next prime (4209544153) can be obtained adding 4209544121 to its sum of digits (32).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2223594025 + 1985950096 = 47155^2 + 44564^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-4209544121 is a prime.

It is not a weakly prime, because it can be changed into another prime (4209544321) 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, 2104772060 + 2104772061.

It is an arithmetic number, because the mean of its divisors is an integer number (2104772061).

Almost surely, 24209544121 is an apocalyptic number.

It is an amenable number.

4209544121 is a deficient number, since it is larger than the sum of its proper divisors (1).

4209544121 is an equidigital number, since it uses as much as digits as its factorization.

4209544121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11520, while the sum is 32.

The square root of 4209544121 is about 64880.9996917433. Note that the first 3 decimals coincide. The cubic root of 4209544121 is about 1614.6498451380.

The spelling of 4209544121 in words is "four billion, two hundred nine million, five hundred forty-four thousand, one hundred twenty-one".