40635191 has 2 divisors, whose sum is σ = 40635192. Its totient is φ = 40635190.

The previous prime is 40635187. The next prime is 40635193. The reversal of 40635191 is 19153604.

40635191 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 40635191 - 2² = 40635187 is a prime.

Together with 40635193, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40635193) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20317595 + 20317596.

It is an arithmetic number, because the mean of its divisors is an integer number (20317596).

Almost surely, 2^40635191 is an apocalyptic number.

40635191 is a deficient number, since it is larger than the sum of its proper divisors (1).

40635191 is an equidigital number, since it uses as much as digits as its factorization.

40635191 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3240, while the sum is 29.

The square root of 40635191 is about 6374.5737896741. The cubic root of 40635191 is about 343.7959596510.

Adding to 40635191 its reverse (19153604), we get a palindrome (59788795).

The spelling of 40635191 in words is "forty million, six hundred thirty-five thousand, one hundred ninety-one".