40023871 has 2 divisors, whose sum is σ = 40023872. Its totient is φ = 40023870.

The previous prime is 40023839. The next prime is 40023901. The reversal of 40023871 is 17832004.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 40023871 - 2⁵ = 40023839 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40023811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20011935 + 20011936.

It is an arithmetic number, because the mean of its divisors is an integer number (20011936).

Almost surely, 2^40023871 is an apocalyptic number.

40023871 is a deficient number, since it is larger than the sum of its proper divisors (1).

40023871 is an equidigital number, since it uses as much as digits as its factorization.

40023871 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1344, while the sum is 25.

The square root of 40023871 is about 6326.4422071177. The cubic root of 40023871 is about 342.0632071997.

Adding to 40023871 its reverse (17832004), we get a palindrome (57855875).

The spelling of 40023871 in words is "forty million, twenty-three thousand, eight hundred seventy-one".