104136191 has 4 divisors (see below), whose sum is σ = 104181000. Its totient is φ = 104091384.

The previous prime is 104136127. The next prime is 104136217. The reversal of 104136191 is 191631401.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 191631401 = 13 ⋅14740877.

It is a cyclic number.

It is not a de Polignac number, because 104136191 - 2⁶ = 104136127 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 104136191.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (104136391) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18716 + ... + 23633.

It is an arithmetic number, because the mean of its divisors is an integer number (26045250).

Almost surely, 2^104136191 is an apocalyptic number.

104136191 is a deficient number, since it is larger than the sum of its proper divisors (44809).

104136191 is an equidigital number, since it uses as much as digits as its factorization.

104136191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44808.

The product of its (nonzero) digits is 648, while the sum is 26.

The square root of 104136191 is about 10204.7141557223. The cubic root of 104136191 is about 470.4721240444.

Adding to 104136191 its reverse (191631401), we get a palindrome (295767592).

The spelling of 104136191 in words is "one hundred four million, one hundred thirty-six thousand, one hundred ninety-one".