2099861603 has 4 divisors (see below), whose sum is σ = 2399841840. Its totient is φ = 1799881368.

The previous prime is 2099861591. The next prime is 2099861653. The reversal of 2099861603 is 3061689902.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2099861603 - 2⁴ = 2099861587 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2099861653) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 149990108 + ... + 149990121.

It is an arithmetic number, because the mean of its divisors is an integer number (599960460).

Almost surely, 2^2099861603 is an apocalyptic number.

2099861603 is a deficient number, since it is larger than the sum of its proper divisors (299980237).

2099861603 is an equidigital number, since it uses as much as digits as its factorization.

2099861603 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 299980236.

The product of its (nonzero) digits is 139968, while the sum is 44.

The square root of 2099861603 is about 45824.2468896107. The cubic root of 2099861603 is about 1280.5510328910.

The spelling of 2099861603 in words is "two billion, ninety-nine million, eight hundred sixty-one thousand, six hundred three".