52809109 has 2 divisors, whose sum is σ = 52809110. Its totient is φ = 52809108.

The previous prime is 52809091. The next prime is 52809121. The reversal of 52809109 is 90190825.

Together with previous prime (52809091) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 30008484 + 22800625 = 5478^2 + 4775^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-52809109 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (52809409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26404554 + 26404555.

It is an arithmetic number, because the mean of its divisors is an integer number (26404555).

Almost surely, 2^52809109 is an apocalyptic number.

It is an amenable number.

52809109 is a deficient number, since it is larger than the sum of its proper divisors (1).

52809109 is an equidigital number, since it uses as much as digits as its factorization.

52809109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6480, while the sum is 34.

The square root of 52809109 is about 7266.9876152365. The cubic root of 52809109 is about 375.1770636420.

The spelling of 52809109 in words is "fifty-two million, eight hundred nine thousand, one hundred nine".