99503809 has 2 divisors, whose sum is σ = 99503810. Its totient is φ = 99503808.

The previous prime is 99503759. The next prime is 99503827. The reversal of 99503809 is 90830599.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 49843600 + 49660209 = 7060^2 + 7047^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-99503809 is a prime.

It is not a weakly prime, because it can be changed into another prime (99503009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49751904 + 49751905.

It is an arithmetic number, because the mean of its divisors is an integer number (49751905).

Almost surely, 2^99503809 is an apocalyptic number.

It is an amenable number.

99503809 is a deficient number, since it is larger than the sum of its proper divisors (1).

99503809 is an equidigital number, since it uses as much as digits as its factorization.

99503809 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 87480, while the sum is 43.

The square root of 99503809 is about 9975.1595977207. The cubic root of 99503809 is about 463.3899052203.

The spelling of 99503809 in words is "ninety-nine million, five hundred three thousand, eight hundred nine".