889813 has 4 divisors (see below), whose sum is σ = 913900. Its totient is φ = 865728.

The previous prime is 889783. The next prime is 889829. The reversal of 889813 is 318988.

889813 = T₆₇ + T₆₈ + ... + T₁₇₇.

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 636804 + 253009 = 798^2 + 503^2 .

It is a cyclic number.

It is not a de Polignac number, because 889813 - 2¹⁷ = 758741 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (37), and also a Moran number because the ratio is a prime number: 24049 = 889813 / (8 + 8 + 9 + 8 + 1 + 3).

It is an Ulam number.

It is a plaindrome in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (889873) 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, 11988 + ... + 12061.

It is an arithmetic number, because the mean of its divisors is an integer number (228475).

2⁸⁸⁹⁸¹³ is an apocalyptic number.

It is an amenable number.

889813 is a deficient number, since it is larger than the sum of its proper divisors (24087).

889813 is a wasteful number, since it uses less digits than its factorization.

889813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24086.

The product of its digits is 13824, while the sum is 37.

The square root of 889813 is about 943.2989981973. The cubic root of 889813 is about 96.1832797851.

It can be divided in two parts, 8898 and 13, that added together give a triangular number (8911 = T₁₃₃).

The spelling of 889813 in words is "eight hundred eighty-nine thousand, eight hundred thirteen".