890101 has 4 divisors (see below), whose sum is σ = 898092. Its totient is φ = 882112.

The previous prime is 890083. The next prime is 890107. The reversal of 890101 is 101098.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 101098 = 2 ⋅50549.

It can be written as a sum of positive squares in 2 ways, for example, as 62001 + 828100 = 249^2 + 910^2 .

It is a cyclic number.

It is not a de Polignac number, because 890101 - 2⁹ = 889589 is a prime.

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

It is a Duffinian number.

890101 is a modest number, since divided by 101 gives 89 as remainder.

890101 is a lucky number.

It is a congruent 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, 3826 + ... + 4051.

It is an arithmetic number, because the mean of its divisors is an integer number (224523).

2⁸⁹⁰¹⁰¹ is an apocalyptic number.

It is an amenable number.

890101 is a deficient number, since it is larger than the sum of its proper divisors (7991).

890101 is a wasteful number, since it uses less digits than its factorization.

890101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7990.

The product of its (nonzero) digits is 72, while the sum is 19.

The square root of 890101 is about 943.4516415800. The cubic root of 890101 is about 96.1936556717.

Adding to 890101 its reverse (101098), we get a palindrome (991199).

It can be divided in two parts, 8 and 90101, that added together give a palindrome (90109).

The spelling of 890101 in words is "eight hundred ninety thousand, one hundred one".