104628409 has 4 divisors (see below), whose sum is σ = 104674804. Its totient is φ = 104582016.

The previous prime is 104628401. The next prime is 104628431. The reversal of 104628409 is 904826401.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 904826401 = 191 ⋅4737311.

It can be written as a sum of positive squares in 2 ways, for example, as 63154809 + 41473600 = 7947^2 + 6440^2 .

It is a cyclic number.

It is not a de Polignac number, because 104628409 - 2³ = 104628401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (104628401) 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, 19632 + ... + 24385.

It is an arithmetic number, because the mean of its divisors is an integer number (26168701).

Almost surely, 2^104628409 is an apocalyptic number.

It is an amenable number.

104628409 is a deficient number, since it is larger than the sum of its proper divisors (46395).

104628409 is an equidigital number, since it uses as much as digits as its factorization.

104628409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46394.

The product of its (nonzero) digits is 13824, while the sum is 34.

The square root of 104628409 is about 10228.8029113870. The cubic root of 104628409 is about 471.2122155889.

The spelling of 104628409 in words is "one hundred four million, six hundred twenty-eight thousand, four hundred nine".