440164589 has 2 divisors, whose sum is σ = 440164590. Its totient is φ = 440164588.

The previous prime is 440164559. The next prime is 440164591. The reversal of 440164589 is 985461044.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 377991364 + 62173225 = 19442^2 + 7885^2 .

It is a cyclic number.

It is not a de Polignac number, because 440164589 - 2¹² = 440160493 is a prime.

Together with 440164591, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (440164559) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 220082294 + 220082295.

It is an arithmetic number, because the mean of its divisors is an integer number (220082295).

Almost surely, 2^440164589 is an apocalyptic number.

It is an amenable number.

440164589 is a deficient number, since it is larger than the sum of its proper divisors (1).

440164589 is an equidigital number, since it uses as much as digits as its factorization.

440164589 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 138240, while the sum is 41.

The square root of 440164589 is about 20980.0998329369. The cubic root of 440164589 is about 760.6853173209.

The spelling of 440164589 in words is "four hundred forty million, one hundred sixty-four thousand, five hundred eighty-nine".