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19394489 is a prime number
BaseRepresentation
bin100100111111…
…0111110111001
31100111100020102
41021332332321
514431110424
61531405145
7323564462
oct111767671
940440212
1019394489
11aa47404
1265b37b5
13403093a
14280bd69
151a817ae
hex127efb9

19394489 has 2 divisors, whose sum is σ = 19394490. Its totient is φ = 19394488.

The previous prime is 19394477. The next prime is 19394509. The reversal of 19394489 is 98449391.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17935225 + 1459264 = 4235^2 + 1208^2 .

It is a cyclic number.

It is not a de Polignac number, because 19394489 - 28 = 19394233 is a prime.

It is a super-2 number, since 2×193944892 = 752292407142242, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (19394429) 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 as a sum of consecutive naturals, namely, 9697244 + 9697245.

It is an arithmetic number, because the mean of its divisors is an integer number (9697245).

Almost surely, 219394489 is an apocalyptic number.

It is an amenable number.

19394489 is a deficient number, since it is larger than the sum of its proper divisors (1).

19394489 is an equidigital number, since it uses as much as digits as its factorization.

19394489 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 279936, while the sum is 47.

The square root of 19394489 is about 4403.9174606253. The cubic root of 19394489 is about 268.6742924302.

The spelling of 19394489 in words is "nineteen million, three hundred ninety-four thousand, four hundred eighty-nine".