40023911 has 2 divisors, whose sum is σ = 40023912. Its totient is φ = 40023910.

The previous prime is 40023901. The next prime is 40023917. The reversal of 40023911 is 11932004.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 40023911 - 2¹⁰ = 40022887 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40023917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20011955 + 20011956.

It is an arithmetic number, because the mean of its divisors is an integer number (20011956).

Almost surely, 2^40023911 is an apocalyptic number.

40023911 is a deficient number, since it is larger than the sum of its proper divisors (1).

40023911 is an equidigital number, since it uses as much as digits as its factorization.

40023911 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 216, while the sum is 20.

The square root of 40023911 is about 6326.4453684514. The cubic root of 40023911 is about 342.0633211527.

Adding to 40023911 its reverse (11932004), we get a palindrome (51955915).

The spelling of 40023911 in words is "forty million, twenty-three thousand, nine hundred eleven".