104389561 has 4 divisors (see below), whose sum is σ = 104413824. Its totient is φ = 104365300.

The previous prime is 104389547. The next prime is 104389603. The reversal of 104389561 is 165983401.

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: 165983401 = 1487 ⋅111623.

It is a cyclic number.

It is not a de Polignac number, because 104389561 - 2⁹ = 104389049 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 104389561.

It is not an unprimeable number, because it can be changed into a prime (104389501) 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, 3745 + ... + 14926.

It is an arithmetic number, because the mean of its divisors is an integer number (26103456).

Almost surely, 2^104389561 is an apocalyptic number.

It is an amenable number.

104389561 is a deficient number, since it is larger than the sum of its proper divisors (24263).

104389561 is an equidigital number, since it uses as much as digits as its factorization.

104389561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24262.

The product of its (nonzero) digits is 25920, while the sum is 37.

The square root of 104389561 is about 10217.1209741296. The cubic root of 104389561 is about 470.8533779094.

The spelling of 104389561 in words is "one hundred four million, three hundred eighty-nine thousand, five hundred sixty-one".