4194389 has 2 divisors, whose sum is σ = 4194390. Its totient is φ = 4194388.

The previous prime is 4194371. The next prime is 4194397. The reversal of 4194389 is 9834914.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3900625 + 293764 = 1975^2 + 542^2 .

It is a cyclic number.

It is not a de Polignac number, because 4194389 - 2¹² = 4190293 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4194319) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2097194 + 2097195.

It is an arithmetic number, because the mean of its divisors is an integer number (2097195).

Almost surely, 2^4194389 is an apocalyptic number.

It is an amenable number.

4194389 is a deficient number, since it is larger than the sum of its proper divisors (1).

4194389 is an equidigital number, since it uses as much as digits as its factorization.

4194389 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 31104, while the sum is 38.

The square root of 4194389 is about 2048.0207518480. The cubic root of 4194389 is about 161.2709837885.

The spelling of 4194389 in words is "four million, one hundred ninety-four thousand, three hundred eighty-nine".