2399103649 has 4 divisors (see below), whose sum is σ = 2399365764. Its totient is φ = 2398841536.

The previous prime is 2399103613. The next prime is 2399103661. The reversal of 2399103649 is 9463019932.

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

It can be written as a sum of positive squares in 2 ways, for example, as 155376225 + 2243727424 = 12465^2 + 47368^2 .

It is a cyclic number.

It is not a de Polignac number, because 2399103649 - 2⁹ = 2399103137 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2399103599 and 2399103608.

It is not an unprimeable number, because it can be changed into a prime (2399103149) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 116812 + ... + 135805.

It is an arithmetic number, because the mean of its divisors is an integer number (599841441).

Almost surely, 2^2399103649 is an apocalyptic number.

It is an amenable number.

2399103649 is a deficient number, since it is larger than the sum of its proper divisors (262115).

2399103649 is an equidigital number, since it uses as much as digits as its factorization.

2399103649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 262114.

The product of its (nonzero) digits is 314928, while the sum is 46.

The square root of 2399103649 is about 48980.6456572389. The cubic root of 2399103649 is about 1338.6991997167.

The spelling of 2399103649 in words is "two billion, three hundred ninety-nine million, one hundred three thousand, six hundred forty-nine".