104139280613 has 4 divisors (see below), whose sum is σ = 104371217100. Its totient is φ = 103907344128.

The previous prime is 104139280591. The next prime is 104139280639. The reversal of 104139280613 is 316082931401.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 80175621409 + 23963659204 = 283153^2 + 154802^2 .

It is a cyclic number.

It is not a de Polignac number, because 104139280613 - 2⁶ = 104139280549 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 (104139280643) 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, 115967570 + ... + 115968467.

It is an arithmetic number, because the mean of its divisors is an integer number (26092804275).

Almost surely, 2^104139280613 is an apocalyptic number.

It is an amenable number.

104139280613 is a deficient number, since it is larger than the sum of its proper divisors (231936487).

104139280613 is an equidigital number, since it uses as much as digits as its factorization.

104139280613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 231936486.

The product of its (nonzero) digits is 31104, while the sum is 38.

The spelling of 104139280613 in words is "one hundred four billion, one hundred thirty-nine million, two hundred eighty thousand, six hundred thirteen".