40404173 has 2 divisors, whose sum is σ = 40404174. Its totient is φ = 40404172.

The previous prime is 40404157. The next prime is 40404209. The reversal of 40404173 is 37140404.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 39100009 + 1304164 = 6253^2 + 1142^2 .

It is a cyclic number.

It is not a de Polignac number, because 40404173 - 2⁴ = 40404157 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40401173) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20202086 + 20202087.

It is an arithmetic number, because the mean of its divisors is an integer number (20202087).

Almost surely, 2^40404173 is an apocalyptic number.

It is an amenable number.

40404173 is a deficient number, since it is larger than the sum of its proper divisors (1).

40404173 is an equidigital number, since it uses as much as digits as its factorization.

40404173 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1344, while the sum is 23.

The square root of 40404173 is about 6356.4276917149. The cubic root of 40404173 is about 343.1432081693.

Adding to 40404173 its reverse (37140404), we get a palindrome (77544577).

The spelling of 40404173 in words is "forty million, four hundred four thousand, one hundred seventy-three".