Search a number
-
+
394788358417 is a prime number
BaseRepresentation
bin1011011111010110011…
…10000100100100010001
31101202000110221112202111
411233223032010210101
522432011304432132
6501210244345321
740344136451455
oct5575316044421
91352013845674
10394788358417
111424798109a2
12646199a5241
132b2c79aa65b
1415171d6c665
15a4090d8647
hex5beb384911

394788358417 has 2 divisors, whose sum is σ = 394788358418. Its totient is φ = 394788358416.

The previous prime is 394788358357. The next prime is 394788358441. The reversal of 394788358417 is 714853887493.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 394422936961 + 365421456 = 628031^2 + 19116^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-394788358417 is a prime.

It is not a weakly prime, because it can be changed into another prime (394788353417) 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, 197394179208 + 197394179209.

It is an arithmetic number, because the mean of its divisors is an integer number (197394179209).

Almost surely, 2394788358417 is an apocalyptic number.

It is an amenable number.

394788358417 is a deficient number, since it is larger than the sum of its proper divisors (1).

394788358417 is an equidigital number, since it uses as much as digits as its factorization.

394788358417 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 162570240, while the sum is 67.

The spelling of 394788358417 in words is "three hundred ninety-four billion, seven hundred eighty-eight million, three hundred fifty-eight thousand, four hundred seventeen".