440423161 has 2 divisors, whose sum is σ = 440423162. Its totient is φ = 440423160.

The previous prime is 440423117. The next prime is 440423167. The reversal of 440423161 is 161324044.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 309091561 + 131331600 = 17581^2 + 11460^2 .

It is a cyclic number.

It is not a de Polignac number, because 440423161 - 2¹⁷ = 440292089 is a prime.

It is not a weakly prime, because it can be changed into another prime (440423167) 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, 220211580 + 220211581.

It is an arithmetic number, because the mean of its divisors is an integer number (220211581).

Almost surely, 2^440423161 is an apocalyptic number.

It is an amenable number.

440423161 is a deficient number, since it is larger than the sum of its proper divisors (1).

440423161 is an equidigital number, since it uses as much as digits as its factorization.

440423161 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2304, while the sum is 25.

The square root of 440423161 is about 20986.2612439663. The cubic root of 440423161 is about 760.8342414781.

The spelling of 440423161 in words is "four hundred forty million, four hundred twenty-three thousand, one hundred sixty-one".