104123491 has 4 divisors (see below), whose sum is σ = 104250832. Its totient is φ = 103996152.

The previous prime is 104123483. The next prime is 104123497. The reversal of 104123491 is 194321401.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 194321401 = 73 ⋅2661937.

It is a cyclic number.

It is not a de Polignac number, because 104123491 - 2³ = 104123483 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (104123497) by changing a digit.

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

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 62436 + ... + 64081.

It is an arithmetic number, because the mean of its divisors is an integer number (26062708).

Almost surely, 2^104123491 is an apocalyptic number.

104123491 is a deficient number, since it is larger than the sum of its proper divisors (127341).

104123491 is an equidigital number, since it uses as much as digits as its factorization.

104123491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 127340.

The product of its (nonzero) digits is 864, while the sum is 25.

The square root of 104123491 is about 10204.0918753214. The cubic root of 104123491 is about 470.4529976842.

Adding to 104123491 its reverse (194321401), we get a palindrome (298444892).

The spelling of 104123491 in words is "one hundred four million, one hundred twenty-three thousand, four hundred ninety-one".