52811389 has 2 divisors, whose sum is σ = 52811390. Its totient is φ = 52811388.

The previous prime is 52811387. The next prime is 52811417. The reversal of 52811389 is 98311825.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 44156025 + 8655364 = 6645^2 + 2942^2 .

It is a cyclic number.

It is not a de Polignac number, because 52811389 - 2¹ = 52811387 is a prime.

Together with 52811387, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (52811387) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26405694 + 26405695.

It is an arithmetic number, because the mean of its divisors is an integer number (26405695).

Almost surely, 2^52811389 is an apocalyptic number.

It is an amenable number.

52811389 is a deficient number, since it is larger than the sum of its proper divisors (1).

52811389 is an equidigital number, since it uses as much as digits as its factorization.

52811389 is an evil number, because the sum of its binary digits is even.

The product of its digits is 17280, while the sum is 37.

The square root of 52811389 is about 7267.1444873485. The cubic root of 52811389 is about 375.1824629087.

It can be divided in two parts, 5281 and 1389, that added together give a triangular number (6670 = T₁₁₅).

The spelling of 52811389 in words is "fifty-two million, eight hundred eleven thousand, three hundred eighty-nine".