2609149709 has 4 divisors (see below), whose sum is σ = 2609853504. Its totient is φ = 2608445916.

The previous prime is 2609149649. The next prime is 2609149733. The reversal of 2609149709 is 9079419062.

2609149709 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2609149709 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 (2609148709) 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, 346307 + ... + 353760.

It is an arithmetic number, because the mean of its divisors is an integer number (652463376).

Almost surely, 2^2609149709 is an apocalyptic number.

It is an amenable number.

2609149709 is a deficient number, since it is larger than the sum of its proper divisors (703795).

2609149709 is an equidigital number, since it uses as much as digits as its factorization.

2609149709 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 703794.

The product of its (nonzero) digits is 244944, while the sum is 47.

The square root of 2609149709 is about 51079.8366187677. The cubic root of 2609149709 is about 1376.6799888947.

The spelling of 2609149709 in words is "two billion, six hundred nine million, one hundred forty-nine thousand, seven hundred nine".