440068289 has 2 divisors, whose sum is σ = 440068290. Its totient is φ = 440068288.

The previous prime is 440068283. The next prime is 440068313. The reversal of 440068289 is 982860044.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 415466689 + 24601600 = 20383^2 + 4960^2 .

It is a cyclic number.

It is not a de Polignac number, because 440068289 - 2¹⁶ = 440002753 is a prime.

It is equal to p_23353988 and since 440068289 and 23353988 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (440068283) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 220034144 + 220034145.

It is an arithmetic number, because the mean of its divisors is an integer number (220034145).

Almost surely, 2^440068289 is an apocalyptic number.

It is an amenable number.

440068289 is a deficient number, since it is larger than the sum of its proper divisors (1).

440068289 is an equidigital number, since it uses as much as digits as its factorization.

440068289 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 110592, while the sum is 41.

The square root of 440068289 is about 20977.8046754183. The cubic root of 440068289 is about 760.6298385745.

The spelling of 440068289 in words is "four hundred forty million, sixty-eight thousand, two hundred eighty-nine".