104040191 has 2 divisors, whose sum is σ = 104040192. Its totient is φ = 104040190.

The previous prime is 104040169. The next prime is 104040203. The reversal of 104040191 is 191040401.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 104040191 - 2⁶ = 104040127 is a prime.

It is a super-2 number, since 2×104040191² = 21648722686632962, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (104040121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 52020095 + 52020096.

It is an arithmetic number, because the mean of its divisors is an integer number (52020096).

Almost surely, 2^104040191 is an apocalyptic number.

104040191 is a deficient number, since it is larger than the sum of its proper divisors (1).

104040191 is an equidigital number, since it uses as much as digits as its factorization.

104040191 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 144, while the sum is 20.

The square root of 104040191 is about 10200.0093627408. The cubic root of 104040191 is about 470.3275082631.

Adding to 104040191 its reverse (191040401), we get a palindrome (295080592).

The spelling of 104040191 in words is "one hundred four million, forty thousand, one hundred ninety-one".