104138091 has 12 divisors (see below), whose sum is σ = 154487632. Its totient is φ = 67548816.

The previous prime is 104138087. The next prime is 104138149. The reversal of 104138091 is 190831401.

It is not a de Polignac number, because 104138091 - 2² = 104138087 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (104138051) 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 11 ways as a sum of consecutive naturals, for example, 156031 + ... + 156696.

Almost surely, 2^104138091 is an apocalyptic number.

104138091 is a deficient number, since it is larger than the sum of its proper divisors (50349541).

104138091 is a wasteful number, since it uses less digits than its factorization.

104138091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 312770 (or 312767 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 27.

The square root of 104138091 is about 10204.8072495271. The cubic root of 104138091 is about 470.4749853346.

Adding to 104138091 its reverse (190831401), we get a palindrome (294969492).

The spelling of 104138091 in words is "one hundred four million, one hundred thirty-eight thousand, ninety-one".