440140171 has 2 divisors, whose sum is σ = 440140172. Its totient is φ = 440140170.

The previous prime is 440140157. The next prime is 440140223. The reversal of 440140171 is 171041044.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 440140171 - 2²¹ = 438043019 is a prime.

It is not a weakly prime, because it can be changed into another prime (440141171) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 220070085 + 220070086.

It is an arithmetic number, because the mean of its divisors is an integer number (220070086).

Almost surely, 2^440140171 is an apocalyptic number.

440140171 is a deficient number, since it is larger than the sum of its proper divisors (1).

440140171 is an equidigital number, since it uses as much as digits as its factorization.

440140171 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 448, while the sum is 22.

The square root of 440140171 is about 20979.5178924588. The cubic root of 440140171 is about 760.6712507967.

The spelling of 440140171 in words is "four hundred forty million, one hundred forty thousand, one hundred seventy-one".