440149217 has 2 divisors, whose sum is σ = 440149218. Its totient is φ = 440149216.

The previous prime is 440149187. The next prime is 440149267. The reversal of 440149217 is 712941044.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 335475856 + 104673361 = 18316^2 + 10231^2 .

It is a cyclic number.

It is not a de Polignac number, because 440149217 - 2¹⁰ = 440148193 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (440149267) 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, 220074608 + 220074609.

It is an arithmetic number, because the mean of its divisors is an integer number (220074609).

Almost surely, 2^440149217 is an apocalyptic number.

It is an amenable number.

440149217 is a deficient number, since it is larger than the sum of its proper divisors (1).

440149217 is an equidigital number, since it uses as much as digits as its factorization.

440149217 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8064, while the sum is 32.

The square root of 440149217 is about 20979.7334825779. The cubic root of 440149217 is about 760.6764620040.

The spelling of 440149217 in words is "four hundred forty million, one hundred forty-nine thousand, two hundred seventeen".