440145539 has 2 divisors, whose sum is σ = 440145540. Its totient is φ = 440145538.

The previous prime is 440145529. The next prime is 440145569. The reversal of 440145539 is 935541044.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 440145539 - 2²⁸ = 171710083 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 440145499 and 440145508.

It is not a weakly prime, because it can be changed into another prime (440145529) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 220072769 + 220072770.

It is an arithmetic number, because the mean of its divisors is an integer number (220072770).

Almost surely, 2^440145539 is an apocalyptic number.

440145539 is a deficient number, since it is larger than the sum of its proper divisors (1).

440145539 is an equidigital number, since it uses as much as digits as its factorization.

440145539 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 43200, while the sum is 35.

The square root of 440145539 is about 20979.6458263718. The cubic root of 440145539 is about 760.6743431954.

The spelling of 440145539 in words is "four hundred forty million, one hundred forty-five thousand, five hundred thirty-nine".