440775689 has 2 divisors, whose sum is σ = 440775690. Its totient is φ = 440775688.

The previous prime is 440775659. The next prime is 440775721. The reversal of 440775689 is 986577044.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 279993289 + 160782400 = 16733^2 + 12680^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-440775689 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (440775659) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 220387844 + 220387845.

It is an arithmetic number, because the mean of its divisors is an integer number (220387845).

Almost surely, 2^440775689 is an apocalyptic number.

It is an amenable number.

440775689 is a deficient number, since it is larger than the sum of its proper divisors (1).

440775689 is an equidigital number, since it uses as much as digits as its factorization.

440775689 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1693440, while the sum is 50.

The square root of 440775689 is about 20994.6585826014. The cubic root of 440775689 is about 761.0371855755.

The spelling of 440775689 in words is "four hundred forty million, seven hundred seventy-five thousand, six hundred eighty-nine".