40023173 has 2 divisors, whose sum is σ = 40023174. Its totient is φ = 40023172.

The previous prime is 40023167. The next prime is 40023209. The reversal of 40023173 is 37132004.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21687649 + 18335524 = 4657^2 + 4282^2 .

It is a cyclic number.

It is not a de Polignac number, because 40023173 - 2⁴ = 40023157 is a prime.

It is a super-3 number, since 3×40023173³ (a number of 24 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40023133) 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, 20011586 + 20011587.

It is an arithmetic number, because the mean of its divisors is an integer number (20011587).

Almost surely, 2^40023173 is an apocalyptic number.

It is an amenable number.

40023173 is a deficient number, since it is larger than the sum of its proper divisors (1).

40023173 is an equidigital number, since it uses as much as digits as its factorization.

40023173 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 504, while the sum is 20.

The square root of 40023173 is about 6326.3870415902. The cubic root of 40023173 is about 342.0612187072.

Adding to 40023173 its reverse (37132004), we get a palindrome (77155177).

The spelling of 40023173 in words is "forty million, twenty-three thousand, one hundred seventy-three".