99603913 has 2 divisors, whose sum is σ = 99603914. Its totient is φ = 99603912.

The previous prime is 99603863. The next prime is 99603919. The reversal of 99603913 is 31930699.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 81938704 + 17665209 = 9052^2 + 4203^2 .

It is an emirp because it is prime and its reverse (31930699) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 99603913 - 2⁹ = 99603401 is a prime.

It is not a weakly prime, because it can be changed into another prime (99603919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49801956 + 49801957.

It is an arithmetic number, because the mean of its divisors is an integer number (49801957).

Almost surely, 2^99603913 is an apocalyptic number.

It is an amenable number.

99603913 is a deficient number, since it is larger than the sum of its proper divisors (1).

99603913 is an equidigital number, since it uses as much as digits as its factorization.

99603913 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 39366, while the sum is 40.

The square root of 99603913 is about 9980.1760004521. The cubic root of 99603913 is about 463.5452481382.

The spelling of 99603913 in words is "ninety-nine million, six hundred three thousand, nine hundred thirteen".