899859393 has 24 divisors (see below), whose sum is σ = 1323577320. Its totient is φ = 589006080.

The previous prime is 899859391. The next prime is 899859403. The reversal of 899859393 is 393958998.

It can be written as a sum of positive squares in 4 ways, for example, as 121616784 + 778242609 = 11028^2 + 27897^2 .

It is not a de Polignac number, because 899859393 - 2¹ = 899859391 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 899859393.

It is not an unprimeable number, because it can be changed into a prime (899859391) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 147463 + ... + 153443.

It is an arithmetic number, because the mean of its divisors is an integer number (55149055).

Almost surely, 2^899859393 is an apocalyptic number.

It is an amenable number.

899859393 is a deficient number, since it is larger than the sum of its proper divisors (423717927).

899859393 is a wasteful number, since it uses less digits than its factorization.

899859393 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6289 (or 6286 counting only the distinct ones).

The product of its digits is 18895680, while the sum is 63.

The square root of 899859393 is about 29997.6564584636. The cubic root of 899859393 is about 965.4391025182.

The spelling of 899859393 in words is "eight hundred ninety-nine million, eight hundred fifty-nine thousand, three hundred ninety-three".