4194989 has 2 divisors, whose sum is σ = 4194990. Its totient is φ = 4194988.

The previous prime is 4194973. The next prime is 4195001. The reversal of 4194989 is 9894914.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2778889 + 1416100 = 1667^2 + 1190^2 .

It is a cyclic number.

It is not a de Polignac number, because 4194989 - 2⁴ = 4194973 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 (4194919) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2097494 + 2097495.

It is an arithmetic number, because the mean of its divisors is an integer number (2097495).

Almost surely, 2^4194989 is an apocalyptic number.

It is an amenable number.

4194989 is a deficient number, since it is larger than the sum of its proper divisors (1).

4194989 is an equidigital number, since it uses as much as digits as its factorization.

4194989 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 93312, while the sum is 44.

The square root of 4194989 is about 2048.1672295006. The cubic root of 4194989 is about 161.2786732657.

The spelling of 4194989 in words is "four million, one hundred ninety-four thousand, nine hundred eighty-nine".