40405163 has 2 divisors, whose sum is σ = 40405164. Its totient is φ = 40405162.

The previous prime is 40405139. The next prime is 40405171. The reversal of 40405163 is 36150404.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 40405163 - 2¹⁰ = 40404139 is a prime.

It is a plaindrome in base 16.

It is not a weakly prime, because it can be changed into another prime (40405063) 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, 20202581 + 20202582.

It is an arithmetic number, because the mean of its divisors is an integer number (20202582).

Almost surely, 2^40405163 is an apocalyptic number.

40405163 is a deficient number, since it is larger than the sum of its proper divisors (1).

40405163 is an equidigital number, since it uses as much as digits as its factorization.

40405163 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 40405163 is about 6356.5055651671. The cubic root of 40405163 is about 343.1460107594.

Adding to 40405163 its reverse (36150404), we get a palindrome (76555567).

The spelling of 40405163 in words is "forty million, four hundred five thousand, one hundred sixty-three".