890105 has 4 divisors (see below), whose sum is σ = 1068132. Its totient is φ = 712080.

The previous prime is 890083. The next prime is 890107. The reversal of 890105 is 501098.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 383161 + 506944 = 619^2 + 712^2 .

It is not a de Polignac number, because 890105 - 2¹⁰ = 889081 is a prime.

It is a super-2 number, since 2×890105² = 1584573822050, which contains 22 as substring.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (890107) 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, 89006 + ... + 89015.

It is an arithmetic number, because the mean of its divisors is an integer number (267033).

2⁸⁹⁰¹⁰⁵ is an apocalyptic number.

It is an amenable number.

890105 is a deficient number, since it is larger than the sum of its proper divisors (178027).

890105 is a wasteful number, since it uses less digits than its factorization.

890105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 178026.

The product of its (nonzero) digits is 360, while the sum is 23.

The square root of 890105 is about 943.4537614531. The cubic root of 890105 is about 96.1937997655.

The spelling of 890105 in words is "eight hundred ninety thousand, one hundred five".