890681 has 12 divisors (see below), whose sum is σ = 1038996. Its totient is φ = 760320.

The previous prime is 890671. The next prime is 890683. The reversal of 890681 is 186098.

It can be written as a sum of positive squares in 2 ways, for example, as 379456 + 511225 = 616^2 + 715^2 .

It is not a de Polignac number, because 890681 - 2¹⁰ = 889657 is a prime.

It is a super-2 number, since 2×890681² = 1586625287522, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 890681.

It is not an unprimeable number, because it can be changed into a prime (890683) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1841 + ... + 2273.

It is an arithmetic number, because the mean of its divisors is an integer number (86583).

2⁸⁹⁰⁶⁸¹ is an apocalyptic number.

It is an amenable number.

890681 is a deficient number, since it is larger than the sum of its proper divisors (148315).

890681 is a wasteful number, since it uses less digits than its factorization.

890681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 472 (or 461 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 32.

The square root of 890681 is about 943.7589734673. The cubic root of 890681 is about 96.2145447642.

The spelling of 890681 in words is "eight hundred ninety thousand, six hundred eighty-one".