104684709509 has 4 divisors (see below), whose sum is σ = 105701066016. Its totient is φ = 103668353004.

The previous prime is 104684709463. The next prime is 104684709523. The reversal of 104684709509 is 905907486401.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 905907486401 = 1019 ⋅889016179.

It is a cyclic number.

It is not a de Polignac number, because 104684709509 - 2²⁰ = 104683660933 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 (104684709539) 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, 508178099 + ... + 508178304.

It is an arithmetic number, because the mean of its divisors is an integer number (26425266504).

Almost surely, 2^104684709509 is an apocalyptic number.

It is an amenable number.

104684709509 is a deficient number, since it is larger than the sum of its proper divisors (1016356507).

104684709509 is a wasteful number, since it uses less digits than its factorization.

104684709509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1016356506.

The product of its (nonzero) digits is 2177280, while the sum is 53.

The spelling of 104684709509 in words is "one hundred four billion, six hundred eighty-four million, seven hundred nine thousand, five hundred nine".