40061191 has 2 divisors, whose sum is σ = 40061192. Its totient is φ = 40061190.

The previous prime is 40061173. The next prime is 40061221. The reversal of 40061191 is 19116004.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 40061191 - 2¹¹ = 40059143 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40061891) 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, 20030595 + 20030596.

It is an arithmetic number, because the mean of its divisors is an integer number (20030596).

Almost surely, 2^40061191 is an apocalyptic number.

40061191 is a deficient number, since it is larger than the sum of its proper divisors (1).

40061191 is an equidigital number, since it uses as much as digits as its factorization.

40061191 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 22.

The square root of 40061191 is about 6329.3910449584. The cubic root of 40061191 is about 342.1694923810.

Adding to 40061191 its reverse (19116004), we get a palindrome (59177195).

The spelling of 40061191 in words is "forty million, sixty-one thousand, one hundred ninety-one".