99999853 has 4 divisors (see below), whose sum is σ = 101369788.
Its totient is φ = 98629920.
The previous prime is 99999847. The next prime is 99999931. The reversal of 99999853 is 35899999.
It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 35899999 = 29 ⋅1237931.
It can be written as a sum of positive squares in 2 ways, for example, as 85877289 + 14122564 = 9267^2 + 3758^2
It is a cyclic number.
It is not a de Polignac number, because 99999853 - 25 = 99999821 is a prime.
It is a Duffinian number.
It is a nialpdrome in base 10.
It is a junction number, because it is equal to n+sod(n) for n = 99999791 and 99999800.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (99999353) by changing a digit.
It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 684858 + ... + 685003.
It is an arithmetic number, because the mean of its divisors is an integer number (25342447).
Almost surely, 299999853 is an apocalyptic number.
It is an amenable number.
99999853 is a deficient number, since it is larger than the sum of its proper divisors (1369935).
99999853 is a wasteful number, since it uses less digits than its factorization.
99999853 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 1369934.
The product of its digits is 7085880, while the sum is 61.
The square root of 99999853 is about 9999.9926499973.
The cubic root of 99999853 is about 464.1586559233.
The spelling of 99999853 in words is "ninety-nine million, nine hundred ninety-nine thousand, eight hundred fifty-three".