899619668 has 72 divisors (see below), whose sum is σ = 1750655592. Its totient is φ = 402927616.

The previous prime is 899619667. The next prime is 899619673. The reversal of 899619668 is 866916998.

It can be written as a sum of positive squares in 4 ways, for example, as 93741124 + 805878544 = 9682^2 + 28388^2 .

899619668 is a strobogrammatic number because it is the same when read upside-down.

It is a self number, because there is not a number n which added to its sum of digits gives 899619668.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (899619667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7961180 + ... + 7961292.

It is an arithmetic number, because the mean of its divisors is an integer number (24314661).

Almost surely, 2^899619668 is an apocalyptic number.

It is an amenable number.

899619668 is a deficient number, since it is larger than the sum of its proper divisors (851035924).

899619668 is a wasteful number, since it uses less digits than its factorization.

899619668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 281 (or 232 counting only the distinct ones).

The product of its digits is 10077696, while the sum is 62.

The square root of 899619668 is about 29993.6604635046. The cubic root of 899619668 is about 965.3533630327.

The spelling of 899619668 in words is "eight hundred ninety-nine million, six hundred nineteen thousand, six hundred sixty-eight".