99995851 has 2 divisors, whose sum is σ = 99995852. Its totient is φ = 99995850.

The previous prime is 99995839. The next prime is 99995869. The reversal of 99995851 is 15859999.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 99995851 - 2⁷ = 99995723 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 99995792 and 99995801.

It is not a weakly prime, because it can be changed into another prime (99995891) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49997925 + 49997926.

It is an arithmetic number, because the mean of its divisors is an integer number (49997926).

Almost surely, 2^99995851 is an apocalyptic number.

99995851 is a deficient number, since it is larger than the sum of its proper divisors (1).

99995851 is an equidigital number, since it uses as much as digits as its factorization.

99995851 is an evil number, because the sum of its binary digits is even.

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

The square root of 99995851 is about 9999.7925478482. The cubic root of 99995851 is about 464.1524639551.

The spelling of 99995851 in words is "ninety-nine million, nine hundred ninety-five thousand, eight hundred fifty-one".