104189985439 has 4 divisors (see below), whose sum is σ = 104352528960. Its totient is φ = 104027441920.

The previous prime is 104189985421. The next prime is 104189985443. The reversal of 104189985439 is 934589981401.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 934589981401 = 1217 ⋅767945753.

It is a cyclic number.

It is not a de Polignac number, because 104189985439 - 2⁷ = 104189985311 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (104189985479) 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, 81270799 + ... + 81272080.

It is an arithmetic number, because the mean of its divisors is an integer number (26088132240).

Almost surely, 2^104189985439 is an apocalyptic number.

104189985439 is a deficient number, since it is larger than the sum of its proper divisors (162543521).

104189985439 is an equidigital number, since it uses as much as digits as its factorization.

104189985439 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 162543520.

The product of its (nonzero) digits is 11197440, while the sum is 61.

The spelling of 104189985439 in words is "one hundred four billion, one hundred eighty-nine million, nine hundred eighty-five thousand, four hundred thirty-nine".