440045509 has 2 divisors, whose sum is σ = 440045510. Its totient is φ = 440045508.

The previous prime is 440045429. The next prime is 440045539. The reversal of 440045509 is 905540044.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 316057284 + 123988225 = 17778^2 + 11135^2 .

It is a cyclic number.

It is not a de Polignac number, because 440045509 - 2¹⁹ = 439521221 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (440045539) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 220022754 + 220022755.

It is an arithmetic number, because the mean of its divisors is an integer number (220022755).

Almost surely, 2^440045509 is an apocalyptic number.

It is an amenable number.

440045509 is a deficient number, since it is larger than the sum of its proper divisors (1).

440045509 is an equidigital number, since it uses as much as digits as its factorization.

440045509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 14400, while the sum is 31.

The square root of 440045509 is about 20977.2617135793. The cubic root of 440045509 is about 760.6167137579.

The spelling of 440045509 in words is "four hundred forty million, forty-five thousand, five hundred nine".