104491909 has 4 divisors (see below), whose sum is σ = 104877760. Its totient is φ = 104106060.

The previous prime is 104491889. The next prime is 104491943. The reversal of 104491909 is 909194401.

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: 909194401 = 5419 ⋅167779.

It is a cyclic number.

It is not a de Polignac number, because 104491909 - 2¹⁵ = 104459141 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 (104491949) 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, 192519 + ... + 193060.

It is an arithmetic number, because the mean of its divisors is an integer number (26219440).

Almost surely, 2^104491909 is an apocalyptic number.

It is an amenable number.

104491909 is a deficient number, since it is larger than the sum of its proper divisors (385851).

104491909 is an equidigital number, since it uses as much as digits as its factorization.

104491909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 385850.

The product of its (nonzero) digits is 11664, while the sum is 37.

The square root of 104491909 is about 10222.1283987240. The cubic root of 104491909 is about 471.0072092573.

The spelling of 104491909 in words is "one hundred four million, four hundred ninety-one thousand, nine hundred nine".