99815803 has 2 divisors, whose sum is σ = 99815804. Its totient is φ = 99815802.

The previous prime is 99815773. The next prime is 99815839. The reversal of 99815803 is 30851899.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-99815803 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 99815803.

It is not a weakly prime, because it can be changed into another prime (99815503) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49907901 + 49907902.

It is an arithmetic number, because the mean of its divisors is an integer number (49907902).

Almost surely, 2^99815803 is an apocalyptic number.

99815803 is a deficient number, since it is larger than the sum of its proper divisors (1).

99815803 is an equidigital number, since it uses as much as digits as its factorization.

99815803 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 77760, while the sum is 43.

The square root of 99815803 is about 9990.7859050227. The cubic root of 99815803 is about 463.8737192889.

The spelling of 99815803 in words is "ninety-nine million, eight hundred fifteen thousand, eight hundred three".