2725698709 has 4 divisors (see below), whose sum is σ = 2725805740. Its totient is φ = 2725591680.

The previous prime is 2725698649. The next prime is 2725698727. The reversal of 2725698709 is 9078965272.

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 127757809 + 2597940900 = 11303^2 + 50970^2 .

It is a cyclic number.

It is not a de Polignac number, because 2725698709 - 2¹⁹ = 2725174421 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2725698709.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2725698109) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9127 + ... + 74395.

It is an arithmetic number, because the mean of its divisors is an integer number (681451435).

Almost surely, 2^2725698709 is an apocalyptic number.

It is an amenable number.

2725698709 is a deficient number, since it is larger than the sum of its proper divisors (107031).

2725698709 is an equidigital number, since it uses as much as digits as its factorization.

2725698709 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107030.

The product of its (nonzero) digits is 3810240, while the sum is 55.

The square root of 2725698709 is about 52208.2245340713. The cubic root of 2725698709 is about 1396.8805901940.

The spelling of 2725698709 in words is "two billion, seven hundred twenty-five million, six hundred ninety-eight thousand, seven hundred nine".