40116191 has 2 divisors, whose sum is σ = 40116192. Its totient is φ = 40116190.

The previous prime is 40116161. The next prime is 40116199. The reversal of 40116191 is 19161104.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 40116191 - 2¹⁸ = 39854047 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40116199) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20058095 + 20058096.

It is an arithmetic number, because the mean of its divisors is an integer number (20058096).

Almost surely, 2^40116191 is an apocalyptic number.

40116191 is a deficient number, since it is larger than the sum of its proper divisors (1).

40116191 is an equidigital number, since it uses as much as digits as its factorization.

40116191 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 216, while the sum is 23.

The square root of 40116191 is about 6333.7343644962. The cubic root of 40116191 is about 342.3260089150.

Adding to 40116191 its reverse (19161104), we get a palindrome (59277295).

The spelling of 40116191 in words is "forty million, one hundred sixteen thousand, one hundred ninety-one".