2109704869 has 2 divisors, whose sum is σ = 2109704870. Its totient is φ = 2109704868.

The previous prime is 2109704801. The next prime is 2109704929. The reversal of 2109704869 is 9684079012.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2030583844 + 79121025 = 45062^2 + 8895^2 .

It is a cyclic number.

It is not a de Polignac number, because 2109704869 - 2¹⁵ = 2109672101 is a prime.

It is a super-2 number, since 2×2109704869² = 8901709268564614322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2109708869) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1054852434 + 1054852435.

It is an arithmetic number, because the mean of its divisors is an integer number (1054852435).

Almost surely, 2^2109704869 is an apocalyptic number.

It is an amenable number.

2109704869 is a deficient number, since it is larger than the sum of its proper divisors (1).

2109704869 is an equidigital number, since it uses as much as digits as its factorization.

2109704869 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 217728, while the sum is 46.

The square root of 2109704869 is about 45931.5236956058. The cubic root of 2109704869 is about 1282.5488090333.

It can be divided in two parts, 210 and 9704869, that added together give a palindrome (9705079).

The spelling of 2109704869 in words is "two billion, one hundred nine million, seven hundred four thousand, eight hundred sixty-nine".