2600890109 has 4 divisors (see below), whose sum is σ = 2601611616. Its totient is φ = 2600168604.

The previous prime is 2600890091. The next prime is 2600890139. The reversal of 2600890109 is 9010980062.

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-2600890109 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 (2600890139) 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, 355319 + ... + 362564.

It is an arithmetic number, because the mean of its divisors is an integer number (650402904).

Almost surely, 2^2600890109 is an apocalyptic number.

It is an amenable number.

2600890109 is a deficient number, since it is larger than the sum of its proper divisors (721507).

2600890109 is an equidigital number, since it uses as much as digits as its factorization.

2600890109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 721506.

The product of its (nonzero) digits is 7776, while the sum is 35.

The square root of 2600890109 is about 50998.9226258751. The cubic root of 2600890109 is about 1375.2257672699.

The spelling of 2600890109 in words is "two billion, six hundred million, eight hundred ninety thousand, one hundred nine".