104390905 has 16 divisors (see below), whose sum is σ = 131541120. Its totient is φ = 79377408.

The previous prime is 104390903. The next prime is 104390911. The reversal of 104390905 is 509093401.

It is a cyclic number.

It is not a de Polignac number, because 104390905 - 2¹ = 104390903 is a prime.

It is a super-2 number, since 2×104390905² = 21794922093438050, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (104390903) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15961 + ... + 21529.

It is an arithmetic number, because the mean of its divisors is an integer number (8221320).

Almost surely, 2^104390905 is an apocalyptic number.

It is an amenable number.

104390905 is a deficient number, since it is larger than the sum of its proper divisors (27150215).

104390905 is a wasteful number, since it uses less digits than its factorization.

104390905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5760.

The product of its (nonzero) digits is 4860, while the sum is 31.

The square root of 104390905 is about 10217.1867458709. The cubic root of 104390905 is about 470.8553986231.

The spelling of 104390905 in words is "one hundred four million, three hundred ninety thousand, nine hundred five".