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899 = 2931

899 has 4 divisors (see below), whose sum is σ = 960. Its totient is φ = 840.

The previous prime is 887. The next prime is 907. The reversal of 899 is 998.

It is a happy number.

899 is nontrivially palindromic in base 16.

899 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Cunningham number, because it is equal to 302-1.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 998 = 2499.

It is a cyclic number.

It is not a de Polignac number, because 899 - 24 = 883 is a prime.

It is a Duffinian number.

899 is an undulating number in base 16.

899 is a modest number, since divided by 99 gives 8 as remainder.

It is a plaindrome in base 10 and base 15.

It is a nialpdrome in base 13.

It is a zygodrome in base 2.

It is not an unprimeable number, because it can be changed into a prime (809) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14 + ... + 44.

It is an arithmetic number, because the mean of its divisors is an integer number (240).

899 is a deficient number, since it is larger than the sum of its proper divisors (61).

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

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

The sum of its prime factors is 60.

The product of its digits is 648, while the sum is 26.

The square root of 899 is about 29.9833287011. The cubic root of 899 is about 9.6513166342.

Subtracting 899 from its reverse (998), we obtain a palindrome (99).

The spelling of 899 in words is "eight hundred ninety-nine", and thus it is an aban number and an oban number.

Divisors: 1 29 31 899