440023148209 has 2 divisors, whose sum is σ = 440023148210. Its totient is φ = 440023148208.

The previous prime is 440023148137. The next prime is 440023148249. The reversal of 440023148209 is 902841320044.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 428014275984 + 12008872225 = 654228^2 + 109585^2 .

It is a cyclic number.

It is not a de Polignac number, because 440023148209 - 2¹¹ = 440023146161 is a prime.

It is not a weakly prime, because it can be changed into another prime (440023148249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 220011574104 + 220011574105.

It is an arithmetic number, because the mean of its divisors is an integer number (220011574105).

Almost surely, 2^440023148209 is an apocalyptic number.

It is an amenable number.

440023148209 is a deficient number, since it is larger than the sum of its proper divisors (1).

440023148209 is an equidigital number, since it uses as much as digits as its factorization.

440023148209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 55296, while the sum is 37.

The spelling of 440023148209 in words is "four hundred forty billion, twenty-three million, one hundred forty-eight thousand, two hundred nine".