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394842193 is a prime number
BaseRepresentation
bin10111100010001…
…101000001010001
31000111222001122221
4113202031001101
51302034422233
6103102501041
712533050264
oct2742150121
91014861587
10394842193
11192972869
12b0294781
1363a56a45
143a620cdb
15249e542d
hex1788d051

394842193 has 2 divisors, whose sum is σ = 394842194. Its totient is φ = 394842192.

The previous prime is 394842169. The next prime is 394842247. The reversal of 394842193 is 391248493.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 360126529 + 34715664 = 18977^2 + 5892^2 .

It is an emirp because it is prime and its reverse (391248493) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-394842193 is a prime.

It is not a weakly prime, because it can be changed into another prime (394842143) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 197421096 + 197421097.

It is an arithmetic number, because the mean of its divisors is an integer number (197421097).

Almost surely, 2394842193 is an apocalyptic number.

It is an amenable number.

394842193 is a deficient number, since it is larger than the sum of its proper divisors (1).

394842193 is an equidigital number, since it uses as much as digits as its factorization.

394842193 is an evil number, because the sum of its binary digits is even.

The product of its digits is 186624, while the sum is 43.

The square root of 394842193 is about 19870.6364518100. The cubic root of 394842193 is about 733.6256688246.

The spelling of 394842193 in words is "three hundred ninety-four million, eight hundred forty-two thousand, one hundred ninety-three".