52809389 has 2 divisors, whose sum is σ = 52809390. Its totient is φ = 52809388.

The previous prime is 52809373. The next prime is 52809401. The reversal of 52809389 is 98390825.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 52809289 + 100 = 7267^2 + 10^2 .

It is a cyclic number.

It is not a de Polignac number, because 52809389 - 2⁴ = 52809373 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (52809329) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26404694 + 26404695.

It is an arithmetic number, because the mean of its divisors is an integer number (26404695).

Almost surely, 2^52809389 is an apocalyptic number.

It is an amenable number.

52809389 is a deficient number, since it is larger than the sum of its proper divisors (1).

52809389 is an equidigital number, since it uses as much as digits as its factorization.

52809389 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 155520, while the sum is 44.

The square root of 52809389 is about 7267.0068804151. The cubic root of 52809389 is about 375.1777267182.

The spelling of 52809389 in words is "fifty-two million, eight hundred nine thousand, three hundred eighty-nine".