99995813 has 2 divisors, whose sum is σ = 99995814. Its totient is φ = 99995812.

The previous prime is 99995807. The next prime is 99995839. The reversal of 99995813 is 31859999.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 77404804 + 22591009 = 8798^2 + 4753^2 .

It is a cyclic number.

It is not a de Polignac number, because 99995813 - 2²⁶ = 32886949 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (99995893) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49997906 + 49997907.

It is an arithmetic number, because the mean of its divisors is an integer number (49997907).

Almost surely, 2^99995813 is an apocalyptic number.

It is an amenable number.

99995813 is a deficient number, since it is larger than the sum of its proper divisors (1).

99995813 is an equidigital number, since it uses as much as digits as its factorization.

99995813 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 787320, while the sum is 53.

The square root of 99995813 is about 9999.7906478086. The cubic root of 99995813 is about 464.1524051600.

The spelling of 99995813 in words is "ninety-nine million, nine hundred ninety-five thousand, eight hundred thirteen".