899869 has 4 divisors (see below), whose sum is σ = 909244. Its totient is φ = 890496.

The previous prime is 899863. The next prime is 899881. The reversal of 899869 is 968998.

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 580644 + 319225 = 762^2 + 565^2 .

It is a cyclic number.

It is not a de Polignac number, because 899869 - 2¹³ = 891677 is a prime.

It is a super-2 number, since 2×899869² = 1619528434322, which contains 22 as substring.

It is a Duffinian number.

It is a plaindrome in base 13.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (899863) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4542 + ... + 4735.

It is an arithmetic number, because the mean of its divisors is an integer number (227311).

2⁸⁹⁹⁸⁶⁹ is an apocalyptic number.

It is an amenable number.

899869 is a deficient number, since it is larger than the sum of its proper divisors (9375).

899869 is an equidigital number, since it uses as much as digits as its factorization.

899869 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9374.

The product of its digits is 279936, while the sum is 49.

The square root of 899869 is about 948.6142524757. The cubic root of 899869 is about 96.5442538218.

The spelling of 899869 in words is "eight hundred ninety-nine thousand, eight hundred sixty-nine".