899220170 has 16 divisors (see below), whose sum is σ = 1634623848. Its totient is φ = 356126400.

The previous prime is 899220143. The next prime is 899220173. The reversal of 899220170 is 71022998.

It is a Cunningham number, because it is equal to 29987²+1.

It can be written as a sum of positive squares in 4 ways, for example, as 863948449 + 35271721 = 29393^2 + 5939^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (899220173) 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 7 ways as a sum of consecutive naturals, for example, 444149 + ... + 446168.

Almost surely, 2^899220170 is an apocalyptic number.

899220170 is a deficient number, since it is larger than the sum of its proper divisors (735403678).

899220170 is a wasteful number, since it uses less digits than its factorization.

899220170 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 890425.

The product of its (nonzero) digits is 18144, while the sum is 38.

The square root of 899220170 is about 29987.0000166739. Note that the first 4 decimals coincide. The cubic root of 899220170 is about 965.2104456598.

The spelling of 899220170 in words is "eight hundred ninety-nine million, two hundred twenty thousand, one hundred seventy".