99865603 has 2 divisors, whose sum is σ = 99865604. Its totient is φ = 99865602.

The previous prime is 99865567. The next prime is 99865613. The reversal of 99865603 is 30656899.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-99865603 is a prime.

It is not a weakly prime, because it can be changed into another prime (99865613) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49932801 + 49932802.

It is an arithmetic number, because the mean of its divisors is an integer number (49932802).

Almost surely, 2^99865603 is an apocalyptic number.

99865603 is a deficient number, since it is larger than the sum of its proper divisors (1).

99865603 is an equidigital number, since it uses as much as digits as its factorization.

99865603 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 349920, while the sum is 46.

The square root of 99865603 is about 9993.2778906623. The cubic root of 99865603 is about 463.9508515991.

The spelling of 99865603 in words is "ninety-nine million, eight hundred sixty-five thousand, six hundred three".