99999603 has 72 divisors (see below), whose sum is σ = 174283200. Its totient is φ = 57095280.

The previous prime is 99999589. The next prime is 99999611. The reversal of 99999603 is 30699999.

It is not a de Polignac number, because 99999603 - 2⁴ = 99999587 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 99999603.

It is not an unprimeable number, because it can be changed into a prime (99999623) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 558568 + ... + 558746.

It is an arithmetic number, because the mean of its divisors is an integer number (2420600).

Almost surely, 2^99999603 is an apocalyptic number.

99999603 is a deficient number, since it is larger than the sum of its proper divisors (74283597).

99999603 is a wasteful number, since it uses less digits than its factorization.

99999603 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 235 (or 212 counting only the distinct ones).

The product of its (nonzero) digits is 1062882, while the sum is 54.

The square root of 99999603 is about 9999.9801499803. The cubic root of 99999603 is about 464.1582691235.

The spelling of 99999603 in words is "ninety-nine million, nine hundred ninety-nine thousand, six hundred three".