99959851 has 4 divisors (see below), whose sum is σ = 99980104. Its totient is φ = 99939600.

The previous prime is 99959833. The next prime is 99959891. The reversal of 99959851 is 15895999.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 99959851 - 2⁵ = 99959819 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 99959792 and 99959801.

It is not an unprimeable number, because it can be changed into a prime (99959891) 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, 2656 + ... + 14386.

It is an arithmetic number, because the mean of its divisors is an integer number (24995026).

Almost surely, 2^99959851 is an apocalyptic number.

99959851 is a deficient number, since it is larger than the sum of its proper divisors (20253).

99959851 is a wasteful number, since it uses less digits than its factorization.

99959851 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20252.

The product of its digits is 1312200, while the sum is 55.

The square root of 99959851 is about 9997.9923484668. The cubic root of 99959851 is about 464.0967566628.

The spelling of 99959851 in words is "ninety-nine million, nine hundred fifty-nine thousand, eight hundred fifty-one".