2609103949 has 4 divisors (see below), whose sum is σ = 2609206236. Its totient is φ = 2609001664.

The previous prime is 2609103947. The next prime is 2609103979. The reversal of 2609103949 is 9493019062.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 1028484900 + 1580619049 = 32070^2 + 39757^2 .

It is a cyclic number.

It is not a de Polignac number, because 2609103949 - 2¹ = 2609103947 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2609103947) 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, 21747 + ... + 75439.

It is an arithmetic number, because the mean of its divisors is an integer number (652301559).

Almost surely, 2^2609103949 is an apocalyptic number.

It is an amenable number.

2609103949 is a deficient number, since it is larger than the sum of its proper divisors (102287).

2609103949 is an equidigital number, since it uses as much as digits as its factorization.

2609103949 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102286.

The product of its (nonzero) digits is 104976, while the sum is 43.

The square root of 2609103949 is about 51079.3886905472. The cubic root of 2609103949 is about 1376.6719406477.

The spelling of 2609103949 in words is "two billion, six hundred nine million, one hundred three thousand, nine hundred forty-nine".